Abstract: A scanning laser radar comprises a transmitting unit comprising a laser and a first lens; a receiving unit comprising a second lens and a light sensor; an actuating unit, wherein the laser and the light sensor are located on the actuating unit, the actuating unit carries and moves with the laser and the light sensor.

Abstract: A polarizing beam splitter comprises a main body. The main body includes a first side surface, a second side surface, a plurality of light emitting surfaces, a plurality of splitting surfaces, and a plurality of polarized beam splitter films. The second side surface is parallel to the first side surface. The plurality of light emitting surfaces is perpendicular to and connected between the first side surface and the second side surface. The light emitting surfaces are “N” in number. Each splitting surface is parallel to the others and is inclined towards the second side surface. The splitting surfaces are also “N” in number. The plurality of polarized beam splitter films are attached to the plurality of splitting surfaces, and have different reflectivities to S-polarized light of an incident light.

Abstract: The disclosure relates to a lighting unit includes a light source and an optical filter. The light source emits a first light beam with a continuous wavelength ranged from about 600 nanometers to about 1500 nanometers. The optical filter is located in the propagation path of the first light beam and allowing the first light with a certain wavelength to pass through. The disclosure also relates to an optical coherence tomography system using the same.

Abstract: This disclosure relates to a pulse oximeter. The pulse oximeter includes a light source; a light acquirer spaced apart from the light source; a processor connected to the light acquirer; a filter in the light path from the light source to the light acquirer; and a first mechanical device. The filter includes a first single band filter having center wavelength of 660 nm and a second single band filter having center wavelength of 940 nm. The first mechanical device moves the filter so that the first single band filter and the second single band filter are alternately in the light path from the light source to the light acquirer. The double band filter can filter the unnecessary light and improve the accuracy of the pulse oximeter.

Abstract: This disclosure relates to a pulse oximeter. The pulse oximeter includes a light source emitting detecting light; a light acquirer spaced apart from the light source and so that the detecting light can get the light acquirer after passing through the object; a processor connected to the light acquirer; and a filter on the light path from the light source to the light acquirer. The filter includes a double band filter having center wavelengths of 660 nm and 940 nm. The double band filter can filter the unnecessary light and improve the accuracy of the pulse oximeter.

Abstract: An optical lens includes a lens body and an anti-reflection film. The lens body includes an optically effective portion and a peripheral portion surrounding the optically effective portion. The optically effective portion is configured for transmitting light therethrough. The optically effective portion has a first surface and an opposite second surface. The first and second surfaces each have a curvature of greater than zero. The anti-reflection film is formed on the first surface of the optically effective portion. A reflectivity of the anti-reflection film to light rays has wavelengths in a range from about 400 nm to about 850 nm being lower than 2%.

Abstract: An infrared absorbing filter includes a glass plate molded by melting a composition of raw materials and cooling the melted composition. The composition of raw materials includes 28-33 by percentage weight (wt %) of phosphorus pentoxide (P2O5), 14-33 wt % of A oxide (A2O), 0.15-4 wt % of B oxide (BO), 2.5-8 wt % of copper oxide (CuO), 1.4-1.65 wt % of aluminum oxide (Al2O3). Wherein A is one of alkali metals, A2O is one of oxidizing alkali metals, B is one of alkaline earth metals, BO is one of oxidizing alkaline earth metals.

Abstract: An IR-cut filter includes a substrate and a film. The substrate made of sapphire. The film is covered on the substrate and is configured for increasing reflectivity of infrared lights and filtering the infrared lights. The film includes a plurality of high refractive index layers and a plurality of low refractive index layers alternately stacked on the substrate. The refractive index of the high refractive index layers is greater than about 2.0, and the refractive index of the low refractive index layers is lower than about 1.5.

Abstract: An infrared absorbing filter includes a glass plate molded by melting a composition of raw materials and cooling the melted composition. The composition of raw materials includes 28-33 by percentage weight (wt %) of phosphorus pentoxide (P2O5), 14-33 wt % of A oxide (A2O), 0.15-4 wt % of B oxide (BO), 2.5-8 wt % of copper oxide (CuO), 1.4-1.65 wt % of aluminum oxide (Al2O3). Wherein A is one of alkali metals, A2O is one of oxidizing alkali metals, B is one of alkaline earth metals, BO is one of oxidizing alkaline earth metals.

Abstract: A lens module includes a lens barrel, at least one lens, and a filter element. The lens barrel includes an object-side end and an image-side end opposite to the object-side end. The at least one lens is received in the lens barrel. The filter element is received in the lens barrel, and includes a transparent substrate, an anti-reflection film, and an infrared filtering film. The transparent substrate includes an object-side surface facing the object-side end and an image-side surface facing the image-side end. The anti-reflection film is coated on the object-side surface, and the infrared filtering film is coated on the image-side surface.

Abstract: A support mechanism includes a base plate, a plurality of mounting members and a plurality of adjusting members. The base plate defines a plurality of receiving holes, and each mounting member is received in one receiving hole. The adjusting members adjustably engage with the mounting members and resist on the base plate, and the plurality of adjusting members are capable of adjusting the height and tilt angle of the mounting members. The present invention further discloses a vacuum coating machine using the support mechanism.

Abstract: An optical lens includes a lens body and an anti-reflection film. The lens body includes an optically effective portion and a peripheral portion surrounding the optically effective portion. The optically effective portion is configured for transmitting light therethrough. The optically effective portion has a first surface and an opposite second surface. The first and second surfaces each have a curvature of greater than zero. The anti-reflection film is formed on the first surface of the optically effective portion. A reflectivity of the anti-reflection film to light rays has wavelengths in a range from about 400 nm to about 850 nm being lower than 2%.

Abstract: A lens module includes a lens barrel, at least one lens, and a filter element. The lens barrel includes an object-side end and an image-side end opposite to the object-side end. The at least one lens is received in the lens barrel. The filter element is received in the lens barrel, and includes a transparent substrate, an anti-reflection film, and an infrared filtering film. The transparent substrate includes an object-side surface facing the object-side end and an image-side surface facing the image-side end. The anti-reflection film is coated on the object-side surface, and the infrared filtering film is coated on the image-side surface.

Abstract: A crucible includes a main body and a cover. The main body includes a first end surface, an opposite second end surface, a hollow part and a solid part. The hollow part and the solid part extend from the first end surface to the second end surface. The hollow part defines a receiving space. The first end surface defines an opening communicating with the receiving space, and includes a step positioned between the hollow part and the solid part. The solid part includes a heat end adjacent to the step. The heat end is heated by an electro-beam. The cover covers the opening, and defines a number of gas holes. The main body and the cover are made of thermal conductive refractory material.

Abstract: A crucible includes a hollow main body defining an opening, a heat body, and a cover. The heat body is received in and connected with the main body. The heat body includes a heat end extending out of the main body through the opening. The heat end can be heated by an electro-beam. The cover is supported by the main body and covers the opening and defines a center hole and a number of gas holes. The heat end passes through the center hole. The main body, the heat body, and the cover are made of thermal conductive refractory material.

Abstract: A projector includes a light source assembly, a digital micro-mirror device, and a projection lens. The light source assembly includes a lamp and a color wheel positioned for receiving light generated by the lamp. The color wheel includes a motor having a contacting portion, a filter, a light-blocker, and a light-isolating sheet. The filter is mounted on the contacting portion of the motor and includes a first area and a second area. Light beams used for forming an image only pass through the first area. The light-blocker is disposed on the filter opposite to the motor. The light-isolating sheet is disposed on the first area and positioned between the filter and the motor and configured for isolating the light beams arrived on the second area.

Abstract: An infrared cut filter includes a substrate, a first membrane group on the substrate, a second membrane group on the first membrane group and a third membrane group on the second membrane group. The first, second, third membrane groups include a plurality of first, second, third combined membranes. Each first combined membrane includes a high-refractive index membrane having an optical thickness of 1.2 times ?/4 and a low-refractive index membrane having an optical thickness of 0.6 times ?/8 in an alternating fashion. Each second combined membrane includes a high-refractive index membrane having an optical thickness of 1.1 times ?/4 and a low-refractive index membrane having an optical thickness of 1.1 times ?/8 in an alternating fashion. Each third combined membrane includes a high-refractive index membrane having an optical thickness of 1.3 times ?/4 and a low-refractive index membrane having an optical thickness of 1.3 times ?/8 in an alternating fashion.

Abstract: An electronic device housing includes a substrate, a film structure, and a protective film. The film structure includes an adhesive film, a film stack, and a protective film. The adhesive film is deposited onto the substrate. The film stack is deposited onto the adhesive film alternating dielectric films and metal films. The metal films are non-continuous with a total thickness of the metal films at a predetermined value. The protective film is deposited onto an upper film of the film stack.

Abstract: A dichroic mirror includes a substrate, a first film stack, and a second film stack. The first film stack is deposed on the substrate and has a structure represented by a first formula: (2HL)n. The second film stack is deposed on the first film stack and has a structure represented by a second formula: (0.325H0.65L0.325H)m. ‘2HL’ and ‘0.325H0.65L0.325H’ respectively represent a double-layer sub-structure of the first film stack and a sandwiched sub-structure of the second film stack, and ‘n’ and ‘m’, which are integers, respectively represent the number of repetitions of the double-layer sub-structures and sandwiched sub-structures ‘H’ and ‘L’ respectively represent a high refractive index layer and a low refractive index layer, both of which have a height equal to ¼ of the reference wavelength of the dichroic mirror, and ‘2’, ‘0.325’ and ‘0.65’ are height coefficients.

Abstract: An electronic device housing includes a substrate, a film structure, and a protective film. The film structure includes an adhesive film, a film stack, and a protective film. The adhesive film is deposited onto the substrate. The film stack is deposited onto the adhesive film alternating dielectric films and metal films. The metal films are non-continuous with a total thickness of the metal films at a predetermined value. The protective film is deposited onto an upper film of the film stack.