Abstract: An electromagnetic wave detection apparatus 100 includes a wavelength separator 123 having a transmittance of electromagnetic waves in a first wavelength band larger than a transmittance of electromagnetic waves in a wavelength band other than the first wavelength band, a wavelength selector 124 having a transmittance of electromagnetic waves in a second wavelength band larger than a transmittance of electromagnetic waves in a wavelength band other than the second wavelength band, and a first detector 130 configured to detect electromagnetic waves progressing via the wavelength separator 123 and the wavelength selector 124. The first wavelength band and the second wavelength band partially overlap with each other.

Abstract: The invention relates to an image sensor apparatus of a camera for detecting light.

Abstract: A reflective module assembly including a housing having an internal space, and a reflective module accommodated in the internal space of the housing, wherein the reflective module includes a reflective holder supporting a reflective member configured to change a path of incident light, at least one damper coupled to the reflective holder, and a damper holder supporting the at least one damper, and wherein the at least one damper is coupled to the reflective holder through the damper holder.

Abstract: An optical processing apparatus includes: a light splitting assembly, disposed on an optical path of an incident light, and configured to receive the incident light and split the incident light into at least two waveband lights, a difference between optical path lengths of the at least two waveband lights being less than a set threshold; and a light sensing assembly, disposed on optical paths of the at least two waveband lights, and configured to receive the at least two waveband lights.

Abstract: An endoscope includes a dichroic prism assembly configured to receive light from an object image through an entrance face. The assembly includes a first prism and a further dichroic prism assembly for splitting light in three light components, the first prism having a cross section with corners designed so that an incoming beam is partially reflected twice inside and exits the first prism through an exit face towards a first sensor. The dichroic prism assembly includes a compensator prism between the first prism and the further dichroic prism assembly. A first path length travelled by the part of the incoming beam reflected twice inside the first prism towards the first sensor is the same as path lengths travelled by a part of the incoming beam entering the further dichroic prism assembly towards each of three sensors, accounting for adjustment for focal plane focus position difference in wavelengths at the sensors.

Abstract: A projection display apparatus according to an embodiment of the present disclosure includes: a plurality of solid-state light sources; an image generating section including a display device that modulates light emitted from the plurality of solid-state light sources; a light source optical system that guides the light emitted from the plurality of solid-state light sources to the image generating section; and a projection optical system that projects image light generated in the image generating section. The light source optical system includes a first reflection device having a plurality of reflection regions and a plurality of transmission regions, with the plurality of transmission regions being arranged in substantially the same direction as a minor-axis direction in an elliptical cross-sectional shape of light emitted from the plurality of solid-state light sources.

Abstract: An illumination apparatus includes first and second laser light source units, each of which is configured by juxtaposing a plurality of laser light sources in an array, and which are provided to oppose each other. The illumination apparatus further includes first and second reflecting members. The second reflecting member has a first gap and is divided into first and second reflecting portions, and the first reflecting member is disposed so as to pass through the first gap. A second outgoing light beam transmitted through a transmitting region of the first reflecting member and a fourth outgoing light beam transmitted through a transmitting region of the second reflecting member are reflected in an output light direction by a reflecting region of the second reflecting member and a reflecting region of the first reflecting member, respectively.

Abstract: A polarization beam splitter includes: a first prism; a second prism; a polarization beam split portion in contact with the second prism; a substrate provided between the polarization beam split portion and the first prism; a first adhesive portion provided between the first prism and the substrate; and a second adhesive portion provided between the polarization beam split portion and the substrate.

Abstract: The present set of embodiments relate to a system, method, and apparatus for an optical configuration in a flow cytometer that allows for independent adjustment of focusing for each light source. Such systems, methods, and apparatuses require a final focusing element to be moved near the beginning of the optical train and for each optical element coming after the final focusing element to be configured to accommodate converging light beams while minimizing the introduction of aberrations into those beams.

Abstract: The present invention provides a color separation optical system which separates an entrance ray into at least three rays of a first color light, a second color light, and a third color light being different color lights and which guides the three rays respectively to solid-state image pickup elements disposed on different optical paths, the system including a first prism, a second prism, a third prism, and an absorption filter disposed between a second exit surface of the second prism and a third entrance surface of the third prism and configured to absorb the second color light. The third entrance surface of the third prism or a surface of the absorption filter facing the third entrance surface is provided with a second dichroic film which reflects the second color light and transmits the third color light.

Abstract: A color separation optical assembly (3) of an image capture device (1) includes, in order from a light incidence side, a first prism (10) which has a first dichroic film (D1) and extracts blue light (LB) reflected by the first dichroic film, a second prism (20) which has a second dichroic film (D2) and extracts red light (LR) transmitted through the first dichroic film and reflected by the second dichroic film, and a third prism (30) which extracts green light (LG) transmitted through the first and second dichroic films. The first dichroic film is a multiband dichroic film which reflects light of an infrared region from a long wavelength side of a red region.

Abstract: This invention realizes an illumination optical system with a small etendue that has a longer lifetime and a high degree of brightness. The invention includes: a laser light source that generates excitation light; a phosphor that generates a fluorescent light by means of the excitation light; a light tunnel that projects the excitation light that is incident at one end towards the phosphor from another end, and projects a fluorescent light generated with the phosphor from the one end; and a dichroic mirror that is provided between the laser light source and the light tunnel, and that allows the fluorescent light or the excitation light to pass through, and reflects the remaining excitation or fluorescent light.

Abstract: A vehicle including a scanning imaging system includes a vehicle body having an outer surface, a propulsion source, and an optical window secured to the outer surface of the vehicle positioned on an optical axis for transmitting electromagnetic radiation received from a portion of an area of interest to the scanning imaging system. The scanning imaging system includes a first achromatic prism pair having prisms with different materials that have different refractive properties, and a second achromatic prism pair having prisms with different materials that have different refractive properties, both positioned on the optical axis. A camera fixed in location is optically coupled to form images from the electromagnetic radiation after being bent by the achromatic prism pairs. A motor including a controller independently rotates the first and second achromatic prism pairs about the optical axis for scanning within the area of interest.

Abstract: A color separating optical system including first to third prisms for separating incident light from an objective lens into three primary color light components, so as to project three color-separated images of a subject onto first to third image sensors, respectively. In order to prevent ghosts from being superposed on a center area of an image frame, the color separating optical system satisfies the condition: ??(?m+?m+1)/2, wherein “?” represents a tilt angle of a second dichroic film on the second prism to a perpendicular plane to an optical axis of the objective lens, and “?m” a diffraction angle of the second light component diffractively reflected from the second image sensor and reentering the second prism.

Abstract: An image pickup optical system including: a first prism including: a first incident surface where subject beam enters; a division surface for dividing the beam from the first incident surface into image-pickup beam and focus-detection beam; and a first exit surface from which reflection beam reflected on the division surface, the image-pickup beam or the focus-detection beam, exits; and a second prism including: a second incident surface on which transmission beam passing through the division surface, the image-pickup beam or focus-detection beam, enters; and a second exit surface from which the transmission beam exits, wherein the reflection beam is reflected on the division surface, reflected on the first incident surface, and reflected on the division surface to reach the first exit surface, and satisfying 0.1<DA/DB<0.5, where DA and DB indicate beam diameters of beams toward the image pickup elements for focus detection and for image pickup.

Abstract: A projector includes an optical arrangement and a cooling arrangement. The optical arrangement includes a light source, a filtering component, a light modulation component and a projection lens. The filtering component filters the light emitted by the light source. The light modulation component modulates the light filtered by the filtering component to form an image. The projection lens projects the image formed by the light modulation component. The cooling arrangement is arranged relative to the optical arrangement to cool the optical arrangement. The cooling arrangement includes a blower, an air duct and a heat sink. The blower blows cooling air. The air duct guides the cooling air from the blower to the filtering component along an cooling air path. The heat sink is disposed in the cooling air path within the air duct and fixedly attached to the light modulation component to thermally contact with the light modulation component.

Abstract: It is disclosed that a color separation optical system improves color reproducibility by obtaining a characteristic which approximates an ideal spectral characteristic in view of influence of polarization separation caused according to the magnitude of an incidence angle. In the color separation optical system, a curve representing a characteristic of a green-reflecting dichroic film DG has a shape along the characteristic curve representing an ideal spectral characteristic corresponding to green light. Further, the characteristic of the blue-reflecting dichroic film DB is associated with that of the green-reflecting dichroic film DG. A part, in which the transmittance of the blue-reflecting dichroic film DB changes from a low transmittance to a high transmittance, in the transmittance characteristic curve representing the characteristic of the blue-reflecting dichroic film DB is included in a predetermined wavelength region associated with the characteristic of the green-reflecting dichroic film DG.

Abstract: A projection system comprising a first imaging component, at least a second imaging component, and a color combiner. The first and second imaging components each comprise an imager and a reflective polarizer that is configured to at least partially separate a light beam from the imager into a first portion and second portion, where the first portion and the second portion have substantially orthogonal polarization states. The first portions of the light beams are directed in the same direction above or below a plane defined by the second portions of the light beams. The color combiner is configured to combine the second portions of the light beams, where the second portions of the light beams have substantially orthogonal polarization states prior to entering the color combiner.

Abstract: An image capture apparatus is provided. The image capture apparatus includes a prism that separates light incident through a lens into at least two color components of light to be output and an image capture device that converts light separated by and output from the prism into a captured image signal. The image capture apparatus includes a fixing plate attached to the image capture device mounted on a substrate. In addition, the image capture apparatus includes a plurality of fixing members for fixing an unattached surface of the fixing plate, which is unattached to the image capture device, on a side surface of the prism through an adhesive.

Abstract: A curve representing a characteristic of a blue-light reflecting dichroic film DB and a curve representing a characteristic of a red-light reflecting dichroic film DR are configured to have shapes that track an ideal spectral characteristic of green. Accordingly, it is possible to obtain a characteristic approximated to the ideal spectral characteristic without using a trimming filter having a dichroic film in an exiting surface of a prism. Since it is not necessary to use the trimming filter having the dichroic film, it is possible to prevent ghost and flare from occurring due to the dichroic film of the trimming filter. Accordingly, it is possible to embody an imaging apparatus having the ideal spectral characteristic with ghost and flare being reduced.

Abstract: Spectral Band Separation (SBS) modules including at least one dichroic element for imaging at least two different still or video images along non co-directional lines of sight for imaging purposes including inter alia displaying multiple 2D images, displaying Extended Field Of View (EFOV) images, stereoscopic imaging, 3D image rendering, and the like. The SBS modules can be implemented as discrete optical attachments for mounting on a color camera module or alternatively can be integrally formed therewith.

Abstract: An exemplary digital camera module (200) includes a lens module (20), a chip package (30) and a focusing structure (40). The lens module includes a holder (24) and a barrel slidably received in the holder. At least one lens element (222) is fixed in the barrel. The holder has several channels (246) defined therein. Each channel respectively has an enlarged end opening (2468) and receives a corresponding wire (28) therein. The focusing structure is attached to the holder. Several pads (36) are formed on the surface of the chip package. Each wire electrically connects with a given pad using a conductive adhesive (52), and, via such a connection, the chip package is able to control the focusing structure to drive movement of the barrel. The respective enlarged end openings serve to help retain the corresponding conductive adhesive proximate/adjacent a given pad.

Abstract: A projection system comprising a first imaging component, at least a second imaging component, and a color combiner. The first and second imaging components each comprise an imager and a reflective polarizer that is configured to at least partially separate a light beam from the imager into a first portion and second portion, where the first portion and the second portion have substantially orthogonal polarization states. The first portions of the light beams are directed in the same direction above or below a plane defined by the second portions of the light beams. The color combiner is configured to combine the second portions of the light beams, where the second portions of the light beams have substantially orthogonal polarization states prior to entering the color combiner.

Abstract: A transmissive LCD is placed in optical series with pixels of an image. The transmissive LCD is set to full transmissivity when bright pixels of the image pass through the transmissive LCD. Transmissivity is decreased where pixels darker than a darkening threshold pass through the transmissive LCD. A darkening curve representative of an amount of darkening performed by the transmissive LCD provides an amount of darkening to be performed on each pixel. Preferably, the darkening curve gradually darkens pixels more as the pixels themselves are darker. The darkening curve may be implemented as a formula or a look-up table in software or drive electronics that energize the transmissive LCD. Both the darkening threshold and the darkening curve may be user selectable.

Abstract: A multispectral image capturing apparatus has different spectral sensitivity characteristics of at least four bands. Three primary bands of the at least four bands have spectral sensitivity characteristics of standard RGB. At least one auxiliary band of the rest of the at least four bands excluding the three primary bands has a spectral sensitivity characteristic of a narrower bandwidth than bandwidths of the RGB.

Abstract: An image displaying apparatus is capable of maintaining the contrast ratios of displayed images even if the f-value of an optical system of the apparatus is lowered to provide bright images, efficiently utilizing a beam from a light source, minimizing the size and weight of the optical system, and being easy to manufacture. The image displaying apparatus includes first to third reflective polarizing plates (120, 121, 122) provided for first to third reflective spatial light modulators (130, 131, 132), respectively. The reflective polarizing plates polarize and separate beams to be injected into the reflective spatial light modulators. In the image displaying apparatus, a color separating optical system has a larger effective diameter than a color composition prism (140).

Abstract: A polarization splitting section has a structure in that a polarization splitting layer is formed of a light reflecting grid member which is arranged in a grid-shaped pattern on an optically-transparent substrate, and an optically-transparent medium is filled between the grid member and the substrate in contact with the grid member surface and the substrate surface, and the grid member and the filled optically-transparent medium are bonded to the substrate with another adhesive agent or tackiness agent formed of an optically-transparent medium interposed. The polarization splitting layer is partly protruded externally from the surfaces of prism materials.

Abstract: An image pickup optical system includes, in order from the object side, a front unit having at least one reflecting surface with power that is rotationally asymmetrical, an aperture stop, and a rear unit having at least one reflecting surface with power that is rotationally asymmetrical. In this case, F-numbers in two directions perpendicular to each other on a plane perpendicular to the optical axis are different. Decentration takes place in one of the two directions and the F-number in a direction perpendicular to a decentering direction is smaller than that in the decentering direction. When the F-number in the decentering direction is represented by FNY and the F-number in the direction perpendicular to the decentering direction is represented by FNX, the optical system satisfies the following condition: 1.1<FNY/FNX<2.0.

Abstract: A color-splitting optical element is disclosed that includes a first prism having a first transmissive curved outer side, a second transmissive curved outer side and an inner side. The color-splitting optical element also includes a second prism having a first transmissive curved outer side, a second side and an inner side. A dichroic element is disposed between the inner side of the first prism and the inner side of the second prism. The first transmissive curved outer side of the first prism is disposed generally opposite the first transmissive curved outer side of the second prism along a first direction and the second transmissive curved outer side of the first prism is disposed generally opposite the second side of the second prism along a second direction. Also disclosed are optical systems utilizing such color-splitting optical elements.

Abstract: Frames are used to hold and/or position components in precise positions in a prism assembly. The frames may be constructed using any of side caps, air gaps, recesses, and hold either a single or multiple planar components. The frames are, for example, immersed in liquid filled channels between adjacent faces of beamsplitters in the prism assembly. The planar components themselves may include waveplates, optical flats, spacer glasses, retarders, Color Selects, substrates, or any other components of the optical device. The planar components may themselves include multiple layers (e.g., polarizers, dichroics, etc). In one embodiment, a polarizer and an air gap are provided. The invention increases precision, lowers cost, and improves quality (e.g., contrast ratio) of any number of devices, but is particularly applicable to Liquid Crystal on Silicon (LCOS) and other microdisplay based projection systems such as High Definition (HD) Rear Projection Televisions (RPTVs).

Abstract: A cross dichroic prism color-synthesizes a plurality of color lights having entered therein separately and emits color-synthesized light to a projection lens. The cross dichroic prism includes a first dichroic film; and a second dichroic film intersecting the first dichroic film so as to pass through the first dichroic film. The cross dichroic prism is configured so that a color light having entered the cross dichroic prism and having become diffracted at a gap created in the first dichroic film over an area where the second dichroic film passes through the first dichroic film is not projected through the projection lens.

Abstract: Exemplary embodiments of the invention provide a projector that can readily correct for chromatic aberration caused by, for example, a projecting lens without having to give a cross dichroic prism, for example, a special preliminary process. Illumination-light components modulated by corresponding liquid-crystal light valves are synthesized in a cross dichroic prism (27) to form image light. The image light enters a projecting lens (29) from which the image light is projected onto a screen, which is not shown in the drawings. In the cross dichroic prism (27) used to synthesize light components, a first prism element (P1) has a refractive index higher than that of remaining prism elements (P2, P3 and P4). This allows a width of a red projection-image component to be made larger than widths of projection-image components of remaining colors, whereby the chromatic aberration in the projecting lens can be readily corrected.

Abstract: A cross dichroic prism as a color-combining optical device and optical modulators constituting an optical device body are fixed with insulating pins being interposed. The optical device body includes a base and reinforcing members, supporting surfaces for supporting and fixing the reinforcing members are formed at a heat conductive member constituting the base. The reinforcing members are supported by the supporting surfaces of the heat conductive member, and also support and fix the optical modulators so as to enhance fixing state of the optical modulators relative to the cross dichroic prism. With this arrangement, an optical device as well as a projector, in which the connecting state of the optical modulators relative to the color-combining optical device can be strengthened so as to form a fine optical image without pixel deviation, can be provided.

Abstract: Device comprising: matrices of reflecting elements which can be electrically driven, and means for deconstructing a beam of polychromatic light and means for reconstructing complementary reflected beams, comprising two dichroic filters with a gradient where, for at least one of these filters, the direction of the gradient HOG, H?OG? makes an angle of inclination of non-zero gradient ?, ?? with a plane (DOE, D?OE?) orthogonal to the reflecting surfaces of the matrices. By virtue of the inclination of the gradient, the chromatic performance of the device is substantially improved.

Abstract: A measurement light (X) is introduced on either one of reflection surfaces (501, 502, 511, 512) to detect a returned light (Y) reflected by the reflection surfaces (501, 502, 511, 512), reflected by a reflecting device and again reflected by the reflection surfaces (501, 502, 511, 512) by an autocollimator (620) to conduct image-processing and calculation by a processor (628), where a position adjuster (690) adjusts an attitude of a cross dichroic prism (45) relative to a fixing plate (447) to eliminate deviation between a position of the measurement light (X) and the returned light (Y) based on the result of the processing, thereby producing a highly accurate prism unit (50).

Abstract: Kernels are designed in different configurations based on design properties of an enclosure or other requirements. A prism assembly having various types of filters, waveplates, beam splitters (e.g., path length matched beam splitters) and/or other optical components are provided to selectively direct light beams to each of red, green, and blue microdisplays that manipulate the light and then combine the manipulated lights into an output image. The prism assembly includes an input face, an output face, and other faces on which the microdisplays are attached in a number of different configurations. Requirements and exact placement of optical components varies depending on which microdisplay is attached to which face. The components of the prism assembly may be arranged in path length matched positions.

Abstract: A thin viewfinder device includes, in order an object side to a viewing eye side, a first prism, and a second prism disposed separately from the first prim across an air gap. The first prism, the air gap and the second prism are arranged in such a manner that an object light flux obtained within a viewing field passes through the first prism, the air gap and the second prism so as to reach the viewing eye, while an object light flux obtained outside the viewing field is totally reflected by surfaces of the first prism so as to be prevented from reaching the viewing eye.

Abstract: Provided are a color combining optical element capable of forming a good projected image on a screen surface while permitting scaling-down of entire apparatus and a projection image display apparatus using it.

Abstract: In a color separating optical system, a first filter adapted to eliminate from light emitted from a red light exit face a light component in a wavelength range longer than a longer-wavelength-side boundary wavelength of a red visible light wavelength region is disposed at a prism surface in an optical path for guiding red region light, whereas a second filter adapted to reflect a light component in a wavelength range longer than a reference wavelength which is longer than the longer-wavelength-side boundary wavelength by a predetermined wavelength but transmit therethrough a light component in a wavelength region shorter than the reference wavelength is placed at the red light exit face.

Abstract: A color splitting prism assembly (100) comprised of three prisms. Each a dichroic filter at an interface (112) between a first and second of the three prisms reflects a first primary color component of a white light beam passing through the prism assembly. The first primary color component is directed to a first modulator (118). The remaining portions of the white light beam enter a second prism (108) and strike a second dichroic filter at the interface between (124) the second and third prisms. The second dichroic filter separates a second primary color component from the white light beam leaving a third primary color component to travel through the third prism (110) to a third modulator. The second primary color component of the white light beam is directed to a second modulator (128).

Abstract: In a TV camera main body, a still-image-luminous-flux-decomposing prism is disposed adjacent to a color-decomposing prism of a TV-image-capturing system, whereby still images whose aberration is favorably corrected as with TV images are obtained in a simple and compact configuration. A mechanical shutter is disposed in an optical path of the still-image-capturing system, so as to prevent image blurring and smear from occurring due to temporal shifts between field images. A four-block color-decomposing prism 11A, in which each glass prism has a form identical to a color-decomposing prism of a dual green type, is constituted by a still-image-capturing prism 2d, and a TV-image-capturing three-color-decomposing prism system comprising a prism for blue 2a, a prism for red 2b, and a prism for green 2c. A mechanical shutter 34 is disposed between the light exit end face 7d of the still-image-capturing prism 2d and its cover glass 6d.

Abstract: A beam splitting prism system includes, at least, a first prism for extracting a first light beam along an advancing direction of a light beam coming from an objective lens, an air separation, and a second prism having a predetermined apical angle and having a reflecting surface for extracting a second light beam, wherein the second prism is arranged to cause the second light beam reflected by the reflecting surface to be totally reflected by a surface of the second prism adjacent to the air separation and then exit from the second prism, and the apical angle of the second prism is set such that interference fringes which occur due to reflection of the second light beam by a solid-state image sensor disposed within the optical path of the second light beam do not overlap in a central portion of an image plane of the solid-state image sensor disposed within the optical path of the second light beam.

Abstract: A color separation beam splitter for projectors is provided, which comprises a plurality of prisms connected with each other and three optical interference filters having different wavelength ranges respectively formed on side surfaces of the plurality of prisms. The three optical interference filters include a yellow color reflective dichroic mirror, a red color reflective dichroic mirror, and a blue color reflective dichroic mirror to filter out the yellow light and provide three primary color lights with high color purity. Moreover, by reflecting a light beam twice, the number of layers of dichroic mirror can be reduced. The color purity of the light is increased after reflected twice by the dichroic mirrors. Moreover, configuration of a liquid crystal projector by use of this prism assembly as color separation unit is also disclosed.

Abstract: A color-separation prism assembly comprises first, second and third prisms. The first and second prisms have entrance surfaces, exit surfaces, and partially-reflecting surfaces, wherein the entrance surface of the second prism is separated by an air gap from the partially-reflecting surface of the first prism. The third prism has an entrance surface and an exit surface, wherein the entrance surface of the third prism is adjacent to the partially-reflecting surface of the second prism. The first prism has a cut-out serving as a flare-stop stop, and providing relief so as to allow the entrance surface of the third prism to slide across a plane disposed over the cut-out into a volume defined by the cut-out. The plane is formed as an extension of the partially-reflecting surface of the first prism. An optical axis passes through the first, second and third prisms. The optical axis passes at normal angles through the entrance surface of the first prism, and the exit surfaces of the first, second and third prisms.

Abstract: A color separation device useful in information display systems is assembled from three prisms in an arrangement that provides for air equivalent thickness adjustment for each color. The air equivalent thickness adjustment provides for the correction of deviations in any of the three prisms, as well as providing a method to correct for the chromatic aberration arising from other optical elements in the information display system. The color separation device improves image quality and provides opportunities to lower the display system cost by using low tolerance components and/or plastic optical components normally having a high chromatic aberration.

Abstract: A color separation prism in which are arranged, in the order according to the direction in which the light from the objective travels: a first prism which extracts a predetermined wavelength component; a first air gap; a second prism which extracts a predetermined wavelength component; a second air gap; and third and fourth prisms that are joined to each other, wherein, in particular, a light reflected by the joint plane is totally reflected by a surface adjacent the second air gap and guided to an image pickup device.

Abstract: An image forming optical system comprises interchangeable lens 14 of a single lens reflex camera and reduction relay optical system 15. A three-color separating prism 16 that separates the photo image into two green photo images (G1 and G2) and a red/blue photo image (R/B) is located behind the image forming optical system, and CCDs 19 through 17 that perform image sensing as to RB, G2 and G1 photo images are located behind the transparent surfaces of prisms 16a through 16c, respectively. G1 CCD 17 and RB CCD 19 perform image sensing for the same photo image area while G2 CCD 18 performs image sensing for a photo image area which is offset by distance .sqroot. {(PH/2).sup.2 +(PV/2).sup.2 } (PH: lateral pixel pitch, PV: vertical pixel pitch) in the lower right direction relative to G1 CCD 17.

Abstract: An imaging apparatus comprises: a color separation optical system for separating an image ray into blue, green, and red image rays, image sensors, having pixels vertically and horizontally arranged, for receiving the image rays and producing blue, red, and green signals wherein at least one of image sensors for blue and red signals has a vertical relative offset against the image sensor for green signal to have a relative interlace relation with the image sensor for blue or red color signal, to produce a screen to be produced, having a higher resolution than these image sensors. A vertical high frequency component is operated from the blue and red signals and is added to the green color signal to produce a second green signal indicative of a green luminance value at a position corresponding to each pixel of the image sensors for blue and red color signals to increase the vertical resolution of the screen.

Abstract: An imaging apparatus comprises: a color separation optical system for separating an image ray into blue, green, and red image rays, image sensors, having pixels vertically and horizontally arranged, for receiving the image rays and producing blue, red, and green signals wherein at least one of image sensors for blue and red signals has a vertical relative offset against the image sensor for green signal to have a relative interlace relation with the image sensor for blue or red color signal, to produce a screen to be produced, having a higher resolution than these image sensors. A vertical high frequency component is operated from the blue and red signals and is added to the green color signal to produce a second green signal indicative of is a green luminance value at a position corresponding to each pixel of the image sensors for blue and red color signals to increase the vertical resolution of the screen.

Abstract: The invention provides a dichroic prism capable of reducing displacements of projection pixels of colors caused by chromatic aberration of magnification. A dichroic prism is formed in the shape of a quadrangular prism as a whole by joining four rectangular prisms together. A red reflecting dichroic plane and a blue reflecting dichroic plane intersect to form substantially an X shape along junction surfaces of the prisms. The red reflecting dichroic plane is convex-shaped by partly changing the thickness of an adhesive layer for connecting the rectangular prisms together. Accordingly, since a red beam can be guided to a projection optical system while being enlarged, it is possible to reduce a projection image of the red beam to be projected onto a projection plane via the projection optical system. This makes it possible to reduce relative displacements of projection pixels of color beams caused by chromatic aberration of magnification.