Abstract: In an imaging section (imaging device), optical filters constituting an optical filter device are inserted and extracted, and an aperture varies an f-number in accordance with the insertion and the extraction of the optical filters. Thus, during the writing operation to the surface of the projection screen, namely during the interactive projector operation, entering of the light in the wavelength band other than that of the detected light DL is suppressed while capturing the detected light DL with the necessary light intensity, and during an alignment (a calibration), the axial chromatic aberration caused by the difference in wavelength band between the pattern image light GL as the image light and the detected light DL is suppressed to achieve an improvement in accuracy.

Abstract: The projector includes a light source device, a first optical modulation device which modulates light emitted from the light source device and emits modulated light as first modulated light, a second optical modulation device which modulates the first modulated light and emits the first modulated light as second modulated light, a optical projection device projecting the second modulated light, and a relay device provided on an optical path between the first optical modulation device and the second optical modulation device, and the relay device includes an image forming lens which forms an image of the first modulated light on a modulation surface of the second optical modulation device and a reflection member disposed at a pupil position of the image forming lens and reflecting the incident first modulated light, and the reflection member has a scattering structure which scatters the first modulated light.

Abstract: A projector includes an optical unit forming an image and a optical projection device projecting the image formed. The optical unit includes a first illumination device, a first light modulation device modulating light emitted from the first illumination device, and a dimming device disposed on an optical path between the first illumination device and the first light modulation device and adjusting, on a region-by-region basis, the illuminance of the light emitted from the first illumination device. The dimming device includes a second light modulation device of reflection type modulating the light emitted from the first illumination device, and a relay device of reflection type forming an image of the modulated light modulated by the second light modulation device on the first light modulation device.

Abstract: An image display device capable of being incorporated into a projector, an HMD, or the like and capable of adjusting an image formation position for each image area, a projector, and a transmission type display device into which the image display device is incorporated. In an image display device, a refractive index distribution regarding a passing area of light emitted from an optical modulation device is changed by a pixel unit of a refractive index distribution variable panel. In a projector in which the image display device is incorporated, the refractive index distribution variable panel is inserted immediately after the optical modulation device so as to make it possible to perform focusing at all areas even for a screen (surface to be irradiated) having any shape.

Abstract: A relay optical system exhibits an action of deflecting light with respect to passing luminous flux as a result of being provided with a light deflection member, and thus a cross-section of the luminous flux can be adjusted to a state of having an appropriate size (enlarged size), that is, a state in which an image is not completely formed but is blurred, at image formation positions of color modulation light valves. Therefore, it is possible to form a favorable image by minimizing moire.

Abstract: A light modulation device having an image forming area in which a plurality of pixels is arranged, and adapted to modulate incident light, and an illumination device adapted to illuminate the image forming area are provided, and the illumination device has an effective dimming area in which a plurality of dimming parts each capable of individually controlling a light intensity of the light for illuminating the image forming area is arranged, illumination areas illuminated by the light emitted from the dimming parts adjacent to each other out of the plurality of dimming parts partially overlap each other, and the light enters the light modulation device, and the position of the peak of the intensity distribution of the light emitted from the dimming part located on the outermost side of the effective dimming area is located on the outer edge of the image forming area or outside the image forming area.

Abstract: The disclosure relates to an illumination device including a light source device that emits a bundle of rays including first and second light beams, a collimating optical system, a diffusing element, a first collecting optical system, a first lens array, a second lens array, and a second condensing optical system in this order. The first light beam and the second light beam enter different regions on the diffusing element. A principal ray of the first light beam and a principal ray of the second light beam travel so as to come close to each other toward the first lens array. The diffusing element is provided in the vicinity of a focal position of the first collecting optical system.

Abstract: Since a relay optical system includes double gauss lenses and pairs of meniscus lenses disposed so as to be convex toward the double gauss lenses, it is possible to sufficiently minimize the occurrence of aberration from dimming light valves to color modulation light valves, to maintain an image formation state with high performance, and further to form a favorable image.

Abstract: A light modulation device having an image forming area in which a plurality of pixels is arranged, and adapted to modulate incident light, and an illumination device adapted to illuminate the image forming area are provided, and the illumination device has an effective dimming area in which a plurality of dimming parts each capable of individually controlling a light intensity of the light for illuminating the image forming area is arranged, illumination areas illuminated by the light emitted from the dimming parts adjacent to each other out of the plurality of dimming parts partially overlap each other, and the light enters the light modulation device, and the position of the peak of the intensity distribution of the light emitted from the dimming part located on the outermost side of the effective dimming area is located on the outer edge of the image forming area or outside the image forming area.

Abstract: A second group has different power in the vertical direction and the horizontal direction of the liquid crystal panel. Therefore, the horizontal-to-vertical ratio of the image of the liquid crystal panel and the horizontal-to-vertical ratio of the image projected on the screen can be set to be different. That is, the projection optical system is able to convert the aspect ratio which is a ratio of width and height. At this time, at the time of converting the aspect ratio, that is, at the time of switching the projection state, it is possible to adjust the position of the image on the screen through a zoom operation or a shift operation of the first driving mechanism or the fourth driving mechanism.

Abstract: According to an embodiment, a wiring board includes an insulating board including a heat transfer region made of silicon nitride and having a thickness in a range between 0.2 mm and 1 mm; and a wiring layer including a pad stacked on the heat transfer region and made of a metal material having a thickness of 1.5 mm or more.

Abstract: A laser projector includes a light source, a scanner that two-dimensionally scans a target object with light emitted from the light source, a light collection system that collects light from the scanner with a predetermined collection angle to form an intermediate image, and a projection lens that projects the intermediate image on a projection surface, and the collection angle is greater than a divergence angle of the light emitted from the light source.

Abstract: A relay system (formed of a plurality of optical systems) that generates a spherical aberration allows each light ray flux to be so adjusted that the cross section thereof has a moderate size (moderate degree of spread) on an image panel surface of each color modulation light valve, that is, the light ray flux is not brought into complete focus but is blurred. Further, as the aberrations to be generated, the amount of spherical aberration is set to be much greater than those of the other third-order aberrations, whereby generated spots are allowed to have the same shape irrespective of the field position.

Abstract: A projector includes: a light source which emits laser light; a first diffusing section which diffuses the laser light emitted from the light source to emit a first diffused light; and a light modulation device which modulates the first diffused light emitted from the first diffusing section. The light modulation device includes a second diffusing section which diffuses the first diffused light emitted from the first diffusing section to emit a second diffused light, and diffusion intensity distribution of the second diffused light emitted from the second diffusing section is distribution which is consecutive around a central axis of the second diffused light.

Abstract: A relay optical system exhibits an action of deflecting light with respect to passing luminous flux as a result of being provided with a light deflection member, and thus a cross-section of the luminous flux can be adjusted to a state of having an appropriate size (enlarged size), that is, a state in which an image is not completely formed but is blurred, at image formation positions of color modulation light valves. Therefore, it is possible to form a favorable image by minimizing moire.

Abstract: Since a relay optical system includes double gauss lenses and pairs of meniscus lenses disposed so as to be convex toward the double gauss lenses, it is possible to sufficiently minimize the occurrence of aberration from dimming light valves to color modulation light valves, to maintain an image formation state with high performance, and further to form a favorable image.

Abstract: A laser projector includes a light source, a scanner that two-dimensionally scans a target object with light emitted from the light source, a light collection system that collects light from the scanner with a predetermined collection angle to form an intermediate image, and a projection lens that projects the intermediate image on a projection surface, and the collection angle is greater than a divergence angle of the light emitted from the light source.

Abstract: A light modulation device side lens group has different power in the longitudinal and lateral directions and different magnifications in the longitudinal and lateral directions. Therefore, it is possible to make the aspect ratio of an image of the liquid crystal panel different from the aspect ratio of an image projected on a screen. That is, conversion can be performed on an aspect ratio which is a ratio of width to height using the optical projection system. At this time, a distance p and a distance p? between a diaphragm and the screen SC side end surface of the light modulation device side lens group satisfies predetermined conditional expressions, so it is possible to achieve a predetermined or higher telecentricity in both states, that is, a first operating state and a second operating state.

Abstract: A light modulation device side lens group has different powers in the longitudinal direction and the lateral direction of a liquid crystal panel. Therefore, as the entire system of the optical projection system, the light modulation device side lens group has different magnification in the longitudinal and lateral directions. Therefore, it is possible to make the aspect ratio of an image of the liquid crystal panel different from the aspect ratio of an image projected on a screen. That is, conversion can be performed on an aspect ratio. At this time, a distance p between each focus or a diaphragm and the screen SC side end surface of the light modulation device side lens group satisfies the conditional expressions, so it is possible to achieve a predetermined or higher telecentricity in both states, that is, a first operating state and a second operating state.

Abstract: A projection optical system which, when projecting an image of an optical modulator onto a projection surface on an enlarged scale, differs the aspect ratio of the image of the optical modulator and the aspect ratio of the image projected onto the projection surface, and includes, in order from the projection surface, a first group which is an enlargement optical system; a second group includes an adjustment optical component with a surface rotationally asymmetrical to an optical axis, when defining at least one direction of the vertical direction and the horizontal direction of the optical modulator as an adjustment direction in which conversion adjustment using compression or extension is performed, the adjustment optical component having at least one optical system which differs in power between the adjustment direction and another direction; and a third group which has a correction optical component with a surface rotationally symmetrical to the optical axis.