Abstract: A structured light generation device includes a laser light source module and a diffractive optical element. After a non-collimated light beam from the laser light source module is received by a diffraction layer of the diffractive optical element, the non-collimated light beam is modulated as an optical information-bearing light. Since no collimator is between the laser light source module and the diffractive optical element, the spacing distance between the laser light source module and the diffractive optical element is shortened. Consequently, the overall structured light generation device is slim.

Abstract: A structured light generation device includes a first surface structure and a second surface structure, which are opposed to each other. The first surface structure includes a diffractive optical element. The second surface structure includes a lenticular lens structure. By the diffractive optical element, an incident dot beam is processed into plural dot beams with different sizes and different brightness values. By the lenticular lens structure, the each dot beam is expanded to a linear beam. After the single dot beam is processed by the structured light generation device, a structured light is generated. The structured light generation device can be applied to a projection system with a 3D gesture sensing control or detection device.

Abstract: An LED (light-emitting diode) signal light comprises a light source composed of a plurality of LEDs mounted on a circuit board and light is cast from a front mantle capable of modulating optically, wherein an external lateral surface of the front mantle is a smooth plane while an internal lateral surface is provided with a plurality of lens cells, which are located oppositely against the LEDs correspondingly. Both the architecture of the cutaway and the cross sections of the lens cell implicate an arcuate curve with an opening oriented a smooth plane. Light cast from an LED will undergo optical modulation of the plurality of lens humps on the lens cell so as to redistribute the light in vertical and horizontal direction and adjust orientation of light to the specified illumination areas.

Abstract: A dot matrix hologram with a hidden image is disclosed, wherein the hidden image technology is applied to a dot matrix hologram. Although the hidden image technology has been used in a conventional hologram, it has not been used in a dot matrix hologram. Although the above two kinds of hologram both can show hidden images with illuminating laser light, the disclosed dot matrix hologram with a hidden image and the conventional hologram with a hidden image use different working principles and have different detailed characteristics to create hidden image regions.

Abstract: A moire pattern technology about a dot matrix hologram for hiding a moire pattern is invented. In the moire pattern hidden region of a dot matrix hologram, the moire pattern foreground area and the moire pattern background area are formed identically by interlacing bright lines and dark lines. While position shifting is formed between the lines of the two areas. This position shifting is several times of the size of the grating dots. Thus, a moire pattern hidden in the moire pattern hidden region without being processed specially has a poor hiding ability. Often the above moire pattern can be identified by eyes directly without using a decoding film. Therefore, such kinds of moire patterns have poor hidden effects. However, the moire pattern of the present invention can prevent the aforesaid phenomenon by a well designed pretended pattern. Moreover, the appearance of such a dot matrix hologram can be beautified by the addition of the pretended patern.

Abstract: An interference apparatus is disclosed wherein the high-visibility quadrature interference signals are obtained by making a pair of polarization beamsplitter, a 45-degree oriented quarter-waveplate and four light-beam detected photodiodes. A three-dimensional interference optical configuration is made. The test-surface light beam and reference light beams are traveled on this optical configuration. The test-surface light beam and reference light beams have orthogonally linearly polarization state with each other. After they pass through the quarter-waveplate, one right circularly polarized light beam and one left circularly polarized light beam are produced. The vector sum of these two circularly polarized light beams is again a linearly polarized light beam which is then divided into two light beams by a non-polarization beamsplitter.

Abstract: An integrating sphere ellipsometer includes an incident light polarization control unit, a reflective light polarization analysis unit, an integrating sphere and a total integrated scattered light detector. The incident light polarization control unit and the reflective light polarization analysis unit jointly function as an ellipsometer to obtain information such as film thickness and material complex refractive indices. Concurrently, the identical incident light polarization control unit, the total integrated scattered light detector and the integrating sphere unite to function as an integrating sphere analyzer to measure material defects, surface roughness, surface particulates, micropollutants, etc.