Abstract: A meta-optical device for light beam combining is provided to include a substrate and a meta-optical array that is formed on the substrate and that is disposed to receive N number of col-mated light beams. The meta-optical array includes a plurality of nanostructures that are made in such a way that the N number of collimated light beams are deflected to travel in a predetermined direction.

Abstract: A metalens-integrated optical engine includes a plurality of light source modules, a collimating and deflecting module and a light-combining module. Each of the light source modules emits a light beam. The collimating and deflecting meta optical members is for collimating and deflecting the light beams such that the light beams are collimated and deflected and travel to a predetermined position. The light-combining module includes a light-combining meta optical array that is located at the predetermined position, that receives the light beams via the collimating and deflecting module, and that deflects the light beams, so as to combine the non-parallel light beams into a single light beam.

Abstract: A meta-optical device for light beam combining is provided to include a substrate and a meta-optical array that is formed on the substrate and that is disposed to receive N number of col-mated light beams. The meta-optical array includes a plurality of nanostructures that are made in such a way that the N number of collimated light beams are deflected to travel in a predetermined direction.

Abstract: A meta-optical device for collimating and deflecting a light beam is provided to include a substrate assembly and at least one meta-optical array that is formed on the substrate assembly and that is disposed to receive at least one light beam. The at least one meta-optical array includes a plurality of nanostructures that are made in such a way that the at least one light beam is collimated and deflected after passing through the at least one meta-optical array.

Abstract: An optical projecting system includes a light-splitting unit for splitting composite source light into a plurality of composite light beam components, and a reflective color wheel rotatable about a rotation axis and including a plurality of multi-layer light-reflecting sections for further splitting each of the composite light beam components into a plurality of colored light beam components for subsequent modulation and projection. Each of the multi-layer light-reflecting sections includes a plurality of light-filtering layers stacked along the rotation axis, and each being capable of reflecting light within a predefined distinct wavelength range, and permitting transmission of light outside the predefined distinct wavelength range therethrough. Sequences of the light-filtering layers of an adjacent pair of the multi-layer light-reflecting sections are different from each other.

Abstract: A color filter assembly rotates around a central axis thereof and includes a carrier defining a radially extending holes, a color filter fixed to the carrier, and a balancing element movably received and selectively positionable along each hole. Selectively positioning the balancing with respect to the central axis allows for statically balancing of mass and adjustment of the center of mass thereby enhancing rotation stability of the color filter assembly.

Abstract: A reflective color wheel is adapted to receive composite source light provided by a light source, and includes a plurality of multi-layer light-reflecting sections for splitting the composite source light into a plurality of colored light beam components. Each of the multi-layer light-reflecting sections includes a plurality of light-filtering layers stacked along an axis. Each of the light-filtering layers of each of the multi-layer light-reflecting sections is capable of reflecting light within a predefined distinct wavelength range, and permits transmission of light outside the predefined distinct wavelength range therethrough. Sequences of the light-filtering layers of an adjacent pair of the multi-layer light-reflecting sections are different from each other.

Abstract: A reflective color wheel is adapted to receive composite source light provided by a light source, and includes a plurality of multi-layer light-reflecting sections for splitting the composite source light into a plurality of colored light beam components. Each of the multi-layer light-reflecting sections includes a plurality of light-filtering layers stacked along an axis. Each of the light-filtering layers of each of the multi-layer light-reflecting sections is capable of reflecting light within a predefined distinct wavelength range, and permits transmission of light outside the predefined distinct wavelength range therethrough. Sequences of the light-filtering layers of an adjacent pair of the multi-layer light-reflecting sections are different from each other.

Abstract: An optical projecting system includes a light-splitting unit for splitting composite source light into a plurality of composite light beam components, and a reflective color wheel rotatable about a rotation axis and including a plurality of multi-layer light-reflecting sections for further splitting each of the composite light beam components into a plurality of colored light beam components for subsequent modulation and projection. Each of the multi-layer light-reflecting sections includes a plurality of light-filtering layers stacked along the rotation axis, and each being capable of reflecting light within a predefined distinct wavelength range, and permitting transmission of light outside the predefined distinct wavelength range therethrough. Sequences of the light-filtering layers of an adjacent pair of the multi-layer light-reflecting sections are different from each other.

Abstract: A color filter assembly rotates around a central axis thereof and includes a carrier defining a radially extending holes, a color filter fixed to the carrier, and a balancing element movably received and selectively positionable along each hole. Selectively positioning the balancing with respect to the central axis allows for statically balancing of mass and adjustment of the center of mass thereby enhancing rotation stability of the color filter assembly.

Abstract: An assembly of beam splitters of the invention includes a roof-prism, a triangle prism and a complementary prism; wherein the roof-prism has a first emitting/receiving surface, the triangle prism has a second emitting/receiving surface and the complementary prism has a third emitting/receiving surface and a fourth emitting/receiving surface. A beam of first wavelength enters the assembly of beam splitters through the second emitting/receiving surface, and leaves it through the first emitting/receiving surface. A beam of second wavelength parallel to the beam of first wavelength enters the assembly of beam splitters through the second emitting/receiving surface, and leaves it through the third emitting/receiving surface. A beam of third wavelength enters the assembly of beam splitters through the fourth emitting/receiving surface, and leaves it through the first emitting/receiving surface. Thus, the optical axis of the beam of third wavelength is parallel to the optical axis of the beam of first wavelength.

Abstract: An apparatus for use in forming colored segments of a color filter on a substrate includes at least one pair of first and second masking plates, and a securing device for securing together the first and second masking plates and the substrate. The substrate has an outer periphery and a first surface which is adapted to be coated with the colored segments. The first masking plate overlies the first surface, and has a first outer periphery corresponding to the outer periphery of the substrate, and at least one first cutout part to expose a portion of the first surface. The second masking plate has a second outer periphery corresponding to the first outer periphery, and at least one second cutout part corresponding to the first cutout part.

Abstract: A machine-implemented method is provided for forming a release surface of a mold. The mold has a mold cavity confined by an inner peripheral surface defining a mold cavity axis. The method includes the steps of: (a) bringing a grinding surface of a rotary grinding portion of a jig grinder into contact with a part of the inner peripheral surface such that the grinding surface is inclined at a predetermined angle relative to the mold cavity axis, and rotating the grinding portion such that the grinding surface grinds the part of the inner peripheral surface; (b) separating the grinding surface from the inner peripheral surface; (c) changing relative positions of the grinding portion and the inner peripheral surface in preparation for grinding another part of the inner peripheral surface; and (d) repeating the steps (a) to (c) until the release surface is formed.

Abstract: A color filter assembly. The color filter assembly rotates around a central axis and includes a first carrier, a second carrier, a protrusion and a color filter. The first carrier has a first contact surface and a first joining portion protruding therefrom. The second carrier has a second contact surface and a second joining portion connected to the first joining portion. The protrusion is disposed on the first or second contact surface. The color filter has an opening with the protrusion inserted therein such that the color filter is fixed between the first and second carriers.

Abstract: A color filter assembly. The color filter assembly rotates around a central axis and includes a first carrier, a second carrier, a protrusion and a color filter. The first carrier has a first contact surface and a first joining portion protruding therefrom. The second carrier has a second contact surface and a second joining portion connected to the first joining portion. The protrusion is disposed on the first or second contact surface. The color filter has an opening with the protrusion inserted therein such that the color filter is fixed between the first and second carriers.

Abstract: An apparatus for use in forming colored segments of a color filter on a substrate includes at least one pair of first and second masking plates, and a securing device for securing together the first and second masking plates and the substrate. The substrate has an outer periphery and a first surface which is adapted to be coated with the colored segments. The first masking plate overlies the first surface, and has a first outer periphery corresponding to the outer periphery of the substrate, and at least one first cutout part to expose a portion of the first surface. The second masking plate has a second outer periphery corresponding to the first outer periphery, and at least one second cutout part corresponding to the first cutout part.

Abstract: A color filter assembly. The color filter assembly rotates around a central axis thereof and includes a carrier, a color filter and a plurality of balancing elements. The carrier rotates around the central axis and has a plurality of holes. The color filter is fixed to the carrier and the balancing elements are movably and individually disposed in the holes such that the center of mass of the color filter assembly is on the central axis.

Abstract: A machine-implemented method is provided for forming a release surface of a mold. The mold has a mold cavity confined by an inner peripheral surface defining a mold cavity axis. The method includes the steps of: (a) bringing a grinding surface of a rotary grinding portion of a jig grinder into contact with a part of the inner peripheral surface such that the grinding surface is inclined at a predetermined angle relative to the mold cavity axis, and rotating the grinding portion such that the grinding surface grinds the part of the inner peripheral surface; (b) separating the grinding surface from the inner peripheral surface; (c) changing relative positions of the grinding portion and the inner peripheral surface in preparation for grinding another part of the inner peripheral surface; and (d) repeating the steps (a) to (c) until the release surface is formed.

Abstract: A process for finishing an end surface of a non-circular post is provided to obtain a good surface precision. The process includes the steps of providing a workpiece having a first end with a first end surface, mounting a filling block around the first end of the workpiece, and surface-finishing the first end surface of the workpiece and an extension end surface of the filling block, which are at least covered by an area bounded by a circular track, by using a cutter.

Abstract: An assembly of beam splitters of the invention includes a roof-prism, a triangle prism and a complementary prism; wherein the roof-prism has a first emitting/receiving surface, the triangle prism has a second emitting/receiving surface and the complementary prism has a third emitting/receiving surface and a fourth emitting/receiving surface. A beam of first wavelength enters the assembly of beam splitters through the second emitting/receiving surface, and leaves it through the first emitting/receiving surface. A beam of second wavelength parallel to the beam of first wavelength enters the assembly of beam splitters through the second emitting/receiving surface, and leaves it through the third emitting/receiving surface. A beam of third wavelength enters the assembly of beam splitters through the fourth emitting/receiving surface, and leaves it through the first emitting/receiving surface. Thus, the optical axis of the beam of third wavelength is parallel to the optical axis of the beam of first wavelength.