Abstract: A dual-slope light guide includes a first surface, a second surface and a curved surface. The first surface has first reflecting structures. The second surface, connected to the first surface, has second reflecting structures. An included angle between the first surface and the second surface is unequal to 180 degrees. The curved surface connects the first surface to the second surface. The first surface, the second surface and the curved surface extend from a first end of the light guide to a second end of the light guide. A light beam incident to the first end of the light guide is reflected and converted by the first reflecting structure and the second reflecting structure into linear light emitted from the curved surface. A light source module and an optical assembly for a scanner are also disclosed.

Abstract: A dual-slope light guide includes a first surface, a second surface and a curved surface. The first surface has first reflecting structures. The second surface, connected to the first surface, has second reflecting structures. An included angle between the first surface and the second surface is unequal to 180 degrees. The curved surface connects the first surface to the second surface. The first surface, the second surface and the curved surface extend from a first end of the light guide to a second end of the light guide. A light beam incident to the first end of the light guide is reflected and converted by the first reflecting structure and the second reflecting structure into linear light emitted from the curved surface. A light source module and an optical assembly for a scanner are also disclosed.

Abstract: A bi-telecentric interferometer continuous zoom imaging device, wherein a collimation object lens set, a telecentric imaging module, a telecentric continuous zoom module, and a CCD of modular design are formed on an integral circular tube main body, and can be calibrated and positioned separately. Then, a multi-partition isolation design is used to partition a housing into independent space for said various modules, to facilitate maintenance and also achieve customization. Collimation object lens set converts parallel light beams of interference pattern into a convergent light beam, and guides it to an imaging route through optical route adjusting means. Then, telecentric imaging module converts interference pattern on imaging route into an telecentric image parallel to optical axis, and telecentric continuous zoom module adjusts a magnifying ratio of telecentric image, then outputs an object image to form it on CCD, thus improving optical distortion and inferior resolution of the prior art.

Abstract: A bi-telecentric continuous zoom imaging device, comprising: a collimation object lens set, to convert parallel light beams of interference patterns into a convergent light beam, and to guide it onto an imaging route through optical route adjusting means. A telecentric imaging module converts interference pattern on imaging route into a telecentric image paralleling to an optical axis. Then, a bi-telecentric continuous zoom module adjusts a magnification ratio of telecentric image, and then outputs an object image. Finally, object image is formed on a charge coupled device (CCD). Through application of bi-telecentric continuous zoom imaging device, deficiency of conventional measurement system can be improved, even if the object distance is changed the magnification ratio of image can be kept, minimum optical distortion and good resolution can also be maintained.

Abstract: A polarization recycling structure that can recycle polarized light efficiently; according to its technical means, said polarization recycling structure is provided with an incident end enabling incident of unpolarized light and an outgoing end enabling radiation of vertical polarized light; it comprises: a first optical structure set adjacent to the incident end, a second optical structure adjacent to the outgoing end and a main gap set between the first and second optical structures; it is characterized by that: said first optical structure comprises of a first lens array and a first polarized grating that are arranged from the adjacent incident end to the main gap; said second optical structure comprises of a second polarized grating, a secondary gap, a louvered multi-twist retarder and a second lens array that are arranged from the adjacent main gap to the outgoing end.

Abstract: A pico projection light system for improving an optical engine of a pico projector and enhancing effects of lighting. The improved pico projection light system comprises a light-emitting diode acting as a light source, a set of three collimators arranged with spaces therebetween and converting light emitted by the light-emitting diode into a parallel light, a set of two lens arrays arranged with spaces therebetween and uniformizing the parallel light, a set of two positive lenses arranged with spaces therebetween and magnifying light emitted from the lens arrays, a polarizing beam splitter receiving the magnified light and having a horizontal polarized light pass therethrough, and a reflective liquid crystal panel reflecting light and modulating optical signals projecting on a screen.

Abstract: A projection lens assembly with six lenses, suitable for being applied to a pico projector projecting vivid and clear images. The projection lens assembly comprises six lenses, that is, a first lens having a minus focal distance, a second lens having a positive focal distance, a third lens having a minus focal distance, a fourth lens having a positive focal distance, a fifth lens having a positive focal distance and a sixth lens having a positive focal distance arranged in sequence and with spaces therebetween, an aperture stop between the second lens having the positive focal distance and the third lens having the minus focal distance, a reflective liquid-crystal panel behind the sixth lens having the positive focal distance, wherein the front sixth lens having the positive focal distance has a greater area than that of the rear reflective liquid-crystal panel.

Abstract: A pico projector includes a light-emitting diode module, collimators, a lens array, magnification lenses, a reflection mirror, a polarizing beam splitter, an LCoS (light crystal on silicon) panel, and an image lens module, wherein the light-emitting diode module emits red, green, and blue lights. The collimators convert light from the light-emitting diode module into collimated light. The lens array homogenizes the collimated light. The magnification lenses magnify the homogenized light from the lens array with a predetermined ratio to be projected onto the LCoS panel. The reflection mirror changes direction of the light path. The polarizing beam splitter allows for transmission of a horizontal polarization light component and reflects a vertical polarization light component. The LCoS panel reflects and modulates the light to form an optic signal. The image lens module includes, in sequence, positive, positive, negative, positive, and positive lenses to project the optical signal to a screen.

Abstract: A dual-panel micro reflective liquid crystal projection device is provided for improving brightness of projected image, including a set of two reflective liquid crystal panels respectively arranged at top side and right side of a polarizing beam splitter so that a light beam emitting from a light source located at bottom side of the beam splitter is received and split by the beam splitter into a horizontal polarization component and a vertical polarization component, which are then respectively reflected and modulated by the two reflective panels into vertically polarized light and horizontal polarized light for simultaneously transmitting identical image signals to a projection system arranged at left side of the beam splitter to thereby double the brightness of the image projected onto a screen.

Abstract: The a light source system of pico projector is composed of a light-emitting diode module, collimators, a lens array, magnification lenses, and an LCoS (light crystal on silicon) panel, arranged in sequence with appropriate spacing in-between. The light-emitting diode module, as the light source, emits red, green, and blue lights. The collimators convert light from the light-emitting diode module into collimated light. The lens array homogenizes the collimated light. The magnification lenses magnify the homogenized light from the lens array with a predetermined ratio onto the LCoS panel. The LCoS panel reflects and modulates the light to form an optic signal to be projected to a screen.

Abstract: The projection lens module contains a number of lenses, a stop, a PBS (polarizing beam splitter), and a LCoS (liquid crystal on silicon) panel. The lenses, from outside towards inside, contains a negative first lens, a positive second lens attached to the negative first lens, a negative third lens, a positive fourth lens forming a doublet structure with the negative third lens, and a positive fifth lens. The stop is positioned between the positive second lens and the negative third lens. The PBS is positioned between the positive fifth lens and the LCoS panel, and the positive fifth lens has an area larger than that of the LCoS panel. The LCoS panel is positioned behind the PBS. The projection module is able to overcome the size issue of the projection lens module, to enhance image resolution and to reduce image distortion.

Abstract: The structure of a projector contains a light path module, a projection lens module, a source lens module, a reflection mirror module, a reflection panel module, and a light source module. The light path module has a U-shaped body. The source lens module and the light source module are configured along a left side of the light path module. The projection lens module is configured along a right side of the light path module. The projection lens module is for projecting image to a screen. The source lens module is for modulating the light from the light source module. The reflection mirror module is installed at a left corner of the light path module to reflect the incident light from the light source module towards the reflection panel module. The reflection panel module is installed from the outside of a right corner of the light path module.

Abstract: A pico projector includes a light-emitting diode module, collimators, a lens array, magnification lenses, a reflection mirror, a polarizing beam splitter, an LCoS (light crystal on silicon) panel, and an image lens module, wherein the light-emitting diode module emits red, green, and blue lights. The collimators convert light from the light-emitting diode module into collimated light. The lens array homogenizes the collimated light. The magnification lenses magnify the homogenized light from the lens array with a predetermined ratio to be projected onto the LCoS panel. The reflection mirror changes direction of the light path. The polarizing beam splitter allows for transmission of a horizontal polarization light component and reflects a vertical polarization light component. The LCoS panel reflects and modulates the light to form an optic signal. The image lens module includes, in sequence, positive, positive, negative, positive, and positive lenses to project the optical signal to a screen.

Abstract: The present invention provides a continuous-zoom imaging device of an interferometer. Reflected lights of a reference plane and a test plane interfere with each other to generate an interference pattern. A collimation device converts a parallel light of the interference pattern into a convergent light. An optical path adjustment means guides the light to a polarizing beam splitter. A continuous-zoom device adjusts the magnification ratio of the interference pattern on the imaging passageway and to output an object image, which is then imaged on a charge-coupled device. The present invention can improve the quality of the interference pattern without using any rotating diffuser, and thus has the characteristics of reduced number of components, lowered cost, and shrunk volume. Besides, the present invention can utilize a joint device to connect the continuous-zoom device and an attenuator so as to achieve automatic light adjustment and convenient operation.

Abstract: The present invention provides a small reflective type liquid crystal projection device, which comprises an X-prism, three PBSs, two dichroic mirrors, at least three totally reflective mirrors, three reflective type liquid crystal plates, and a projection object lens. The present invention uses the X-prism matched with the three PBSs and a newly invented 3D light projection system to combine polarized light beams of the three primary colors into one, hence accomplishing the highest use efficiency and the design of light splitting and combining paths and color separating and combining. The reflective type liquid crystal projection device of the present invention has both the advantages of small volume and reduced cost.

Abstract: The present invention provides a continuous-zoom imaging device of an interferometer. Reflected lights of a reference plane and a test plane interfere with each other to generate an interference pattern. A collimation device converts a parallel light of the interference pattern into a convergent light. An optical path adjustment means guides the light to a polarizing beam splitter. A continuous-zoom device adjusts the magnification ratio of the interference pattern on the imaging passageway and to output an object image, which is then imaged on a charge-coupled device. The present invention can improve the quality of the interference pattern without using any rotating diffuser, and thus has the characteristics of reduced number of components, lowered cost, and shrunk volume. Besides, the present invention can utilize a joint device to connect the continuous-zoom device and an attenuator so as to achieve automatic light adjustment and convenient operation.

Abstract: The present invention proposes a transmission-type liquid crystal projection display, which comprises an incident light source, a light-separating means, three transmission-type liquid crystal display, an L-shaped dichroic polarizing prism set, an optical path adjusting means, and a projection lens. The light source provides a single polarized light. The light-separating means separates the polarized light into three colored lights of the three primary wavelengths. The three liquid crystal displays respective correspond to the three colored lights. The optical path adjusting means is used to let the three colored lights travel through the corresponding three liquid crystal displays and then be incident on the L-shaped dichroic polarizing prism set so that the three colored lights can be synthesized into a single output light beam. The projection lens projects the output light beam onto a screen. The present invention has the effects of high efficiency, low cost, and simplified fabrication process.

Abstract: The present invention proposes a transmission-type liquid crystal projection display, which comprises an incident light source, a light-separating means, three transmission-type liquid crystal display, an L-shaped dichroic polarizing prism set, an optical path adjusting means, and a projection lens. The light source provides a single polarized light. The light-separating means separates the polarized light into three colored lights of the three primary wavelengths. The three liquid crystal displays respective correspond to the three colored lights. The optical path adjusting means is used to let the three colored lights travel through the corresponding three liquid crystal displays and then be incident on the L-shaped dichroic polarizing prism set so that the three colored lights can be synthesized into a single output light beam. The projection lens projects the output light beam onto a screen. The present invention has the effects of high efficiency, low cost, and simplified fabrication process.

Abstract: The present invention proposes a reflective type liquid crystal projection system, which comprises an incident light source providing an S-polarization light beam or a P-polarization light beam as the incident light beam. A polarization of color-splitting device having a first polarization of color splitter and a second polarization of color splitter is used to split the incident light beam of three primary colors into two sets of light beams, which respectively penetrate through or are reflected. The two sets of light beams split by the first polarization of color splitter are reflected by two reflective mirrors, traverse two polarizing plates arranged between the reflective mirrors and the second polarization of color splitter, and are then incident on the second polarization of color splitter. At least a retarder is arranged between the reflective mirrors and the polarization of color-splitting device.

Abstract: An apparatus for measuring the curvature radii of spherical and cylindrical surfaces is provided. The apparatus comprises a base, a probe and four ball rings of the same size, wherein the four ball rings are provided on the base and arranged into a square having a side length C. The probe is upward and downward movably mounted on the top surface of the base at the center of the square. There is also provided a method for measuring the curvature radii of spherical and cylindrical surfaces, wherein a ball-ring-distance is equal to C for the cylindrical surface or is equal to .sqroot.2C for the spherical surface.