Abstract: A projector is provided, which includes a light source for emitting incident light rays, a pancake lens assembly, and optical element assembly for forming a pattern by the incident light rays emitted from the pancake lens assembly. A pancake lens assembly includes a polarizer, a wave plate, and a lens connected to the polarizer or the wave plate. The pancake lens assembly is disposed between the light source and the optical element assembly and configured to fold light path of the incident light rays based on the polarization of the incident light rays in order to reduce the total module height of the projector.

Abstract: A light source module having a wide field of view (FOV) is provided. The light source module includes a plurality of point light sources and a total internal reflection (TIR) lens array. The point light sources are configured to respectively emit a plurality of light beams. The TIR lens array is disposed on paths of the light beams and includes a transparent substrate and a plurality of TIR lenses arranged on the transparent substrate. The transparent substrate is located between the point light sources and the TIR lenses. Each of the TIR lenses has an inclined surface inclined with respect to the transparent substrate, and inclined surfaces of the TIR lenses are configured to totally internally reflect the light beams to form the wide FOV.

Abstract: An optical module and a related projector are disclosed. The optical module includes a light source and an optical structure. The light source emitting a light, and the optical structure is disposed on the light source for receiving the light. The optical structure includes a first surface and a second surface. The first surface is configured to deflect the light. The second surface has a plurality of microstructures and is configured to project a predetermined pattern when the light passing through the second surface, and the second surface corresponds to the first surface.

Abstract: A contactor includes an enclosed space containing an arc extinguishing medium or a vacuum, separated into two chambers by a movable contact head connected with hollow contact units enabling the two chambers to communicate; at least one of the chambers is provided with a static contact head connected with contact units; the movable contact head implements reciprocal movement, the contact units of the movable contact head are engaged with and disengaged from the contact units of the static contact head, and the two chambers are alternately compressed and expanded, wherein the arc extinguishing medium flows back and forth at arc gaps between the movable contact head and the static contact head through the hollow contact units and circulates between the two chambers, providing a contactor and a self-circulating reciprocal synchronous arc extinguishing pump thereof, to turn ON, turn OFF of the contactor and implement a synchronous arc extinguishing.

Abstract: A wide-angle optical lens system includes a negative-powered first lens group, a positive-powered second lens group and a positive-powered third lens group arranged in an order from an object side to an image side.

Abstract: A microlens array device includes a substrate and a microlens array. The microlens array is disposed on the substrate and includes a plurality of first lenses and a plurality of second lenses. Each of the first lenses is used to project a first pattern on a far field. Each of the second lenses is used to project a second pattern on the far field. The first pattern has a first area on the far field. The second pattern has a second area on the far field. The first area is different from the second area. One of the two patterns is completely overlapped on the other one of the two patterns.

Abstract: The optical apparatus includes a first light source, a second light source, and at least one lens unit. An incident surface of the lens unit faces the first light source and the second light source. The normal vector of a first emitting surface of the first light source is tilted toward a first direction opposite to the second light source. The normal vector of a second emitting surface of the second light source is tilted toward a second direction opposite to the first light source. The first direction is opposite to the second direction such that an angle is formed between the normal vector of the first emitting surface and the normal vector of the second emitting surface. The angle is greater than 0 degree and less than or equal to 90 degrees.

Abstract: A microlens array device includes a substrate and a microlens array. The microlens array is disposed on the substrate and includes a plurality of first lenses and a plurality of second lenses. Each of the first lenses is used to project a first pattern on a far field. Each of the second lenses is used to project a second pattern on the far field. The first pattern has a first area on the far field. The second pattern has a second area on the far field. The first area is different from the second area. One of the two patterns is completely overlapped on the other one of the two patterns.

Abstract: An illumination device including a light source array and a microlens array is provided. The light source array includes a plurality of light sources arranged in an array. The microlens array includes a plurality of microlenses arranged in an array. The illumination device satisfies the following conditional expressions so as to produce structured light: z=z0+dz and z0=(m/2)*(P2/?), where z is a distance between the light source array and the microlens array along a central axis of the microlens array, P is a lens pitch of the microlens array, ? is a wavelength of the light sources, m is an integer and m? is a non-integer number. The illumination device satisfies 1%?dz/z0?5% or ?5%?dz/z0??1%.

Abstract: A PDMS valve-less micro pump structure includes a PDMS body having a contour surface, a membrane covering the contour surface of the PDMS body, and a PZT actuator located on the membrane. The contour surface of the PDMS body to be sealed by the membrane and the PZT actuator has in series a lead-in cavity, a lead-in nozzle structure, a main cavity, a lead-out nozzle structure, and a lead-out cavity. The PZT actuator is located right above the main cavity. By providing the PDMS as a material to form the body of the micro pump, the micro pump can then be mass-produced with less cost and simpler structuring. Also, substantial elasticity and bio-compatibility for the micro pump can be achieved.