40results about How to "Short light path" patented technology

The invention relates to a 3D printing device and method, and belongs to the field of 3D technologies. The device comprises a liquid storage tank with a transparent tank bottom, a liquid crystal display screen, a light source system, a lifting rod supporting plate and display control equipment, wherein the liquid storage tank is used for containing a liquid photopolymerisable material; the liquid crystal display screen is arranged below the liquid storage tank; the light source system is arranged below the liquid crystal display screen, and light emitted by the light source system is transmitted through the liquid crystal display screen and the bottom surface of the liquid storage tank and transmitted to the photopolymerisable material; the lifting rod supporting plate is located in the liquid storage tank, a cavity is formed between the lower surface of the lifting rod supporting plate and the bottom of the liquid storage tank, and the liquid photopolymerisable material in the liquid storage tank flows into the cavity along with upward movement of the lifting rod supporting plate; the display control equipment is connected with the liquid crystal display screen, the light source system and the lighting rod supporting plate and used for driving the liquid crystal display screen, the light source system and the lighting rod supporting plate. Curing equipment in the 3D printing device is improved, and the improved curing equipment is low in graph deformation rate and greatly improves the forming precision of 3D printing.

A white LED light source device and an LED backlight using the white LED light source can produce, among other features, white light with sufficient luminous intensity, uniform color tone, and high luminous utilization efficiency. A light path for producing white light with favorable color mixture can be shortened. The white LED light source device can be configured to include a bluish green LED lamp which can emit bluish green light by the combination of a blue LED device and a green phosphor material and a purple LED lamp which can emit purple light by the combination of a blue LED device and a red phosphor material. The bluish green light from the bluish green LED lamp and the purple light from the purple LED lamp are subjected to additive color mixture to produce white light with a spectrum containing three primary color wavelength components.

A digital light processing projector comprising a light source, a splitter module, a plurality of total internal reflection (TIR) prisms and digital mirror devices (DMDs), a combiner and a projection lens is provided. The splitter module is disposed in the light path of the light after the light source to split the light into a plurality of color lights. Each color light is incident to the total reflection plane of the TIR prism with an incident angle larger than the critical angle, and then is totally reflected to the DMD. Thereafter, each color light is reflected by the DMD being incident to the total reflection plane of the TIR prism with an incident angle smaller than the critical angle, and then passes through the TIR prism directly. The color lights passing through the TIR prisms are combined by the combiner and then projected by the projection lens.

A high efficiency micro projection optical engine includes a light source module, a lens assembly, a micro display panel and a projection lens. An image of the luminous surface of light emitting elements of the light source module is formed in the vicinity of the micro display panel. The micro display panel is arranged on the path of emission light of the lens assembly to modulate incident light and obtain image light with image information. The projection lens is used to project the image information on the micro display panel and form an image onto a screen. The optical engine enhances efficiency by means of critical illumination.

A three-DOF (Degree of Freedom) heterodyne grating interferometer displacement measurement system comprises a dual-frequency laser, a grating interferometer, a measurement grating, receivers and an electronic signal processing component; the grating interferometer comprises a polarizing beam splitter, a reference grating and dioptric elements; the measurement system realizes displacement measurement on the basis of grating diffraction, the optical Doppler Effect and the optical beat frequency principle. Three linear displacements can be output by the system when the grating interferometer and the measurement grating perform a three-DOF linear relative motion. The measurement system can reach sub-nanometer and higher resolution and precision, and can simultaneously measure three linear displacements. The measurement system has the advantages of being environmentally insensitive, high in measurement precision, small in size, light in weight, and is capable of improving the overall performances of an ultra-precision stage of a lithography machine as a position measurement system for this stage.

The invention discloses a gaseous substance detection device based on a transparent capillary structure and fluorescence, comprising a light source system arranged on a capillary base, a fluorescent coating capillary, and a detection system, and the detection system and the light source system are perpendicular to the wall of the fluorescent coating capillary The detection system and the light source system are set at 90 degrees. The light source system includes an LED light source, a collimation system, and a first optical filter connected in sequence. The detection system includes a detector and a second optical filter. The light source and the detector of the present invention are arranged at 90 degrees along the wall of the fluorescent coating capillary tube, avoiding the direct irradiation of the excitation light on the detector, the optical path is short, and the influence of water vapor is reduced, and the second filter is isolated from the gas path and will not be affected Gas pollution; the setting of the casing can reduce the stray light of the excitation light, enhance the fluorescence intensity and signal intensity; reduce the background noise of the signal, and reduce the influence of water vapor and dust adhesion in the detection gas.

The invention discloses a mini three-dimensional scanning confocal microscope. The double-comb linear scanning comprises an actor, two X linear drivers using as stator, Z linear driver, the second microlens is set on the actor, the light from the point-source become to the collimated light laser beam after passing the fist microlens, the beam goes through the mini optical spectroscope, reflected by the micro-scanning reflector, and focalize on the sample by the second microlens, the reflected or fluorescence light passes the second microlens and the micro-scanning reflector along the original path and returns to the mini optical spectroscope, the reflected light shines in the micro-light detector through the third microlens and the pinhole, the controlling device is used to collect and process the data and control said linear scanning on the focus of the direction X and Y.

The present invention discloses a large wheel diameter outside diameter optical projection measuring equipment. It includes a mechanical positioning component and an optical measuring head mounted on the mechanical positioning component. Said optical measuring head is composed of back projection laser source, beam expander lens, optical slit component, imaging lens component, CCD camera and signal control processing device. It is applicable to diameter measurement of geometric revaling body whose wheel diameter is greater than 500mm, specially it is applicable to diameter measurement of geometric revolving body whose thread width is greater than 80 mm.