45results about How to "Optically compact" patented technology

The invention discloses a roll angle measuring method based on a grating and a device thereof, which belongs to the technical field of photoelectric detection. A laser lases and emerges directly, or emerges after collimation through a collimating lens; the light is directly incident on a one-dimensional plane transmission grating, or reversely incident on the grating through a retrodirective reflector; plus-minus first stage diffracted light from the grating is focused to form two diffracted light points through a lens; a photodetector is used to detect the variations in positions of the two focused light points, thus figuring out a roll angle. The optical structure of the device is compact and simple, and brings convenience to practice; in addition, the accuracy, the stability and the economical efficiency are also high. The grating is used as a sensitive device; error separation is achieved, and the interference-free feature is improved by using the differential measurement of double diffracted beams; few optical devices are used; and the power of the light source is low; the cost is low; mobile parts do not require to be provided with cables; the angle measurement distinguishability is as high as 0.5 and even higher; different requirements of measurement accuracy can be met just by replacing the grating with gratings having different numbers of lines.

An optical system of satellite-borne differential absorption spectrometer comprises a relay optical system and an Offner imaging spectrometer system. The relay optical system is composed of a relay reflector, relay lenses and a color separation filter. The Offner imaging spectrometer system is composed of an incident slit, a convex grating, and a concave reflector. The relay optical system uses the color separation filter to split a detection waveband to form four channels, which are focused by four groups of relay lenses to the incident slit of the spectrometer. Light at each waveband entersthe spectrometer from the incident slit of the spectrometer, is split by the convex grating, and has the light path turned and focused on a detector. The invention utilizes a relay reflector to turn the light path, and utilizes the color separation filter to split the detection waveband into four channels, to therefore improve the detection resolution of the system, ensure measurement accuracy and realize compact volume of the whole optical system. The Offner imaging spectrometer has excellent imaging spectrum performance and reduced distortion. The invention facilitates miniaturization and weight reduction of the whole system, and is suitable for space technology.

The invention provides a method and a device for simultaneously measuring five degrees-of-freedom errors based on light beam drift compensation. The method and the device are used for solving the problems of low measurement precision, small measurement range and poor anti-interference capability of the existing high-precision simultaneous measurement method for guide rail five degrees-of-freedom. A collimating lens, a prism assembly, a polarization beam splitting prism and a quarter-wave plate are arranged between a laser device and a right-angle prism plated with a beam splitting film, so as to realize processing of incident light and reflected light, information of the reflected light and transmitted light after beam splitting is received and measured by means of a four-quadrant detector and a position sensitive detector, and the measurement of pitch angle, deflection angle and rolling angle errors, horizontal straightness errors, vertical straightness errors and light drift compensation are realized. The method and the device utilize double beam differential measurement to realize error separation, enhance the anti-interference capability, employ few optical devices and are low in light source power and cost; the optical structure is simple, the operation is convenient, the moving parts are not required to be provided with cables, and the field measurement is facilitated; and the angle measurement resolution is high.

A projection system having a first tilting mirror matrix, a second tilting mirror matrix, and an imaging lens, which projects the first tilting mirror matrix onto the second tilting mirror matrix, wherein each tilting mirror matrix has multiple tilting mirrors, the tilting axes of which are positioned in a modulator surface plane. The imaging lens includes a first lens and an imaging mirror, and the imaging mirror forms an aperture stop of the imaging lens, wherein the aperture diaphragm includes an uneven angle of 90° together with the normal of the modulator surface of the first tilting mirror matrix without taking into account any optical path folds.

The invention relates to an automatic device for compact multi-band and full-polarization imaging. The automatic device for the compact multi-band and full-polarization imaging is characterized in that the automatic device comprises a lens fixing rack, a filter turning wheel, a 1/4 wave plate unit, a line polaroid unit, a collimation lens and a motor system. The motor system controls the filter turning wheel to gate a current wave band, the 1/4 wave plate unit and the line polaroid unit are rotated, and a control unit triggers a CCD to achieve shutter imaging. The polarization image of the current wave band is acquired, and the multi-band and full-polarization imaging is achieved by automatically rotating the filter turning wheel. According to the device, the filter turning wheel, the 1/4 wave plate unit, the line polaroid unit, stepping motors and the like are fixedly arranged on the lens fixing rack, the automatic device has the advantages of being simple in optical structure, compact in size, low in power consumption, low in cost and the like, and the possibility of achieving a portable spectral polarization imager is provided. The automatic device can be used for combining polarizing elements such as filters, phase retarders and polaroids at multiple angles, and important application value is achieved for studying the problems of polarization changes, multi-band and full-polarization parameter measuring and the like in an optical system.

The invention relates to a micro fiber spectrometer based oncortex-M3. The micro fiber spectrometer comprises an optical imaging system, an acquisition and processing system of a spectrum electric signal and a host computer software system. A folded and crossed non-symmetric Czerny-Turner structure is employed by the optical imaging system which comprises an incident slit, a collimation lens, a plane diffraction grating, a focusing reflection mirror and a linear array CCD. The acquisition and processing system of the spectrum electric signal comprises an impedance matching circuit, a CCD front end processing chip, and a cortex-M3 processor. The micro fiber spectrometer has the advantages of compact optical structure, simplified spectral telecommunication acquisition system, high using efficiency of cortex-M3 chip function, stable, rapid and low-noise spectral signal performance, and convenient system use.

The invention relates to a full-target surface single-camera three-dimensional digital image correlation measurement system and method using an X-cube prism and a single color camera. The system comprises an X-cube prism (4), a lighting source (2), a plane mirror (3), a color camera (5), a light barrier (1) and a computer (6); the plane mirror reflects light from different perspectives into the X-cube prism (4), the prism separates the colors of the light and combines the light into a beam of light, the beam of light enters a target surface of the camea through a lens, and the camera collectsbinocular stereo images with separated color channels. The matching of images of different color channels is performed by using the traditional 3D-DIC algorithm to obtain parallax error data of red and blue images, and the three-dimensional shape, displacement and deformation of a measured object are obtained. The full-target surface single-camera three-dimensional digital image correlation measurement system provided by the invention has a compact structure, the system parameters can be easily adjusted, the stereoscopic imaging quality is high, when experiments of three-dimensional shape anddeformation are performed in special fields such as microscopy and high speed and the like, the high-precision three-dimensional measurement can be completed more conveniently and efficiently.

The invention discloses an optical system of a large-field wide-band airborne differential absorption imaging spectrometer, which comprises a front telescopic imaging system and an Offner-Littrow spectral imaging system, wherein the front telescopic imaging system mainly comprises a front ultraviolet objective lens; the Offner-Littrow spectral imaging system specifically comprises an optical filter, an incident slit, a convex grating and a concave reflector; the front ultraviolet objective lens consists of three independent front lenses according to detection wavebands (200-276 nm, 276-380 nm,380-500 nm), and the field of view of each lens reaches 40 degree. The Offner-Littrow spectral imaging system is also independently composed of three spectrometers according to the above wavebands. Each waveband light is focused from a front lens and enters the incident slit of the spectrometer, three groups of spectra to be detected enter the spectrometer through the optical filter at the rear end of the incident slit of the spectrometer, the corresponding spectral information is reflected by the concave reflector and then is split by the convex grating, and the light path is turned to the concave reflector and then focused on a detector. According to the optical system of the large-field wide-band airborne differential absorption imaging spectrometer, the measurement accuracy is ensured, and the whole optical system is compact in size.

The invention discloses a head-mounted 3D display device. The display device comprises a backlight source, a display and a lens, wherein the backlight source is used for supplying quasi parallel light to the display; the display is used for modulating the quasi parallel light emitted by the backlight source and projecting the modulated light to the lens; the lens is used for converting the modulated light to parallel light and projecting the parallel light to human eyes. The head-mounted 3D display device realizes an augmented reality effect by a single reflection and enlarges a field angle through the single aspherical half-reflection lens. Since extra lenses are eliminated, the head-mounted 3D display device has a simple and compact optical structure, and the efficiency for solar energy utilization and the portability of the head-mounted display are improved.

The invention provides a laser light source and a projection device. The laser light source comprises a laser diode array used for emitting laser along a first direction and a wavelength conversion rotary plate. The plane where the plate surface of the wavelength conversion rotary plate is located is parallel to the first direction. The wavelength conversion rotary plate comprises an annular side wall perpendicular to the plate surface, and the annular side wall is provided with a wavelength conversion layer. The laser light source further comprises a reflecting device used for reflecting the laser emitted along the first direction and converging the laser to the wavelength conversion layer of the annular side wall of the wavelength conversion rotary plate, and a driving device used for driving the wavelength conversion rotary plate to rotate. In the laser light source, the wavelength conversion layer is arranged on the annular side wall of the wavelength conversion rotary plate, so that the plate surface of the wavelength conversion rotary plate can be parallel to the emission direction of laser instead of being vertical to the emission direction of laser like in the prior art. Moreover, the laser diode array and the wavelength conversion rotary plate are disposed at the same side of the reflecting device, which makes the laser light source more compact in optical structure and smaller in size.

The invention provides a non-defocused optical wide-angle lens for projection display. The wide-angle lens can realize non-defocus in a wider temperature range, and meanwhile, projection images are clear and fine. The lens mainly comprises a first lens set, a second lens set and a TIR (total internal reflection) prism which are sequentially arranged from the position of a projection screen to the position of a display chip, wherein an aperture diaphragm is arranged between the first lens set and the second lens set; all lens pieces of the first lens set and the second lens set are made of colorless optical glass or colorless optical plastic; the overall focal power of the first three lens pieces in the first lens set is negative, and at least one of the first three lens pieces in the first lens set is a plastic non-spherical lens; at least one of first four lens pieces of the second lens set is a plastic non-spherical lens, at least part of other lens pieces in the first four lens pieces constitute a balsaming lens part, and the optical power of the balsaming lens part is negative; the refractive index n1 of the colorless optical glass is larger than 1.4 and smaller than 1.95, and the refractive index n2 of the colorless optical plastic is larger than 1.5 and smaller than 1.6.

The invention discloses a bidirectional observation and full spectrum direct reading light path system for a spectrograph. The light path system comprises a bidirectional observation front lighting system and a crossed dispersion main light path system, wherein the bidirectional observation front lighting system is located in the horizontal direction, the crossed dispersion main light path system is located in the vertical direction, and two systems form a T-shaped structure; the bidirectional observation front lighting system is used for imaging a target on a slit and light rays from the front lighting system enter the crossed dispersion main light path system through the slit to obtain a two-dimensional spectrograph which is received by a plane array detector, so that full spectrum direct reading is realized. The bidirectional observation and full spectrum direct reading light path system for the spectrograph has the following characteristics that: the bidirectional observation front lighting system and the vertical crossed dispersion main light path system form the T-shaped structure, so that the structure is compact and the space is saved; by adoption of the vertical light path, the dispersion main light path system is capable of improving coma aberration and astigmatism favorably, increasing imaging quality, improving resolution, dispensing with any moving component and reducing loss of elements; and the light path system disclosed by the invention has the advantages of few simple optical elements, no special aspherical mirror, easy processing and low cost.

A multi-color fluorescent excitation and detection device comprises at least one illumination module, a cartridge and at least one detection module. The illumination module provides an illumination light at specified range of wavelengths. The cartridge comprises a detection chip comprising plural detection wells arranged around the peripheral of the detection chip. The detection chip is circular shape. Each of the detection wells is accommodated a corresponding fluorescent dye therein. Each of the detection wells includes a first wall and a second wall. The illumination light transmits through the first wall to illuminate on the fluorescent sample so as to excite a fluorescent signal, and the fluorescent signal generated from the fluorescent sample transmits through the second wall. The detection module receives the fluorescent signal and convert the fluorescent signal to an electrical signal.

A multi-color fluorescent excitation and detection device is disclosed and includes at least one illumination module, a cartridge and at least one detection module. The at least one illumination module provides an illumination light at specified range of wavelengths. The cartridge comprises a detection chip comprising plural detection wells arranged around the peripheral of the detection chip. Each of the detection wells is accommodated a corresponding fluorescent dye therein. Each of the detection wells includes a first wall and a second wall. The illumination light transmits through the first wall to illuminate on the fluorescent sample so as to excite a fluorescent signal, and the fluorescent signal generated from the fluorescent sample transmits through the second wall. The at least one detection module receives the fluorescent signal and converts the fluorescent signal to an electrical signal.

The invention relates to a micro-nano optical fibre fluorescence sensor system based on an evanescent field, and a preparation method, and can solve the technical problem that detection cannot be carried out due to the fact that the traditional fluorescence optical fibre sensor difficultly detects a fluorescence signal of a substance when the fluorescence signal emitted by the substance is weak orthe distance is relatively far. The micro-nano optical fibre fluorescence sensor system comprises a light source, a lens, an optical fibre, a photoelectric converter and a computer, and further comprises a micro-nano optical fibre; and the lens, the optical fibre, the micro-nano optical fibre, the optical fibre, the photoelectric converter and the computer are sequentially arranged after the light source, and sequentially connected. The optical structure in the invention is simple and compact; by utilization of the principle of sensitive detection of the evanescent field on the optical signal, a very weak fluorescence signal can be detected through the micro-nano optical fibre sensor system based on the evanescent field; and thus, high-sensitivity and far-distance weak fluorescence real-time analysis can be realized.

The invention discloses a method for solving an initial structure of a coaxial reflective optical system based on a particle swarm algorithm, which relates to the technical field of optical design. The method comprises the following steps of 1, determining a coaxial reflective optical system of a to-be-solved initial structure and corresponding to-be-solved basic structure parameters according to application requirements, and 2, solving to-be-solved basic structure parameters by using a particle swarm algorithm, and further obtaining an initial structure of the coaxial reflective optical system. The particle swarm optimization is used as a tool, the weighted sum of five geometric aberrations of the reflective optical system is used as an evaluation criterion, an initial structure design process of the coaxial reflective optical system is converted into a process for solving a globally optimal solution of an evaluation function of the coaxial reflective optical system, and complicated algebraic calculation and later debugging are not needed. The same optimal structure parameters can be directly obtained, the optical structure of the obtained coaxial reflective optical system is compact, the imaging effect is close to the diffraction limit at the Nyquist frequency, and the design efficiency and reliability are greatly improved.

The invention provides a light-emitting device. The light-emitting device comprises a heat conduction substrate, a reflecting layer and a light-emitting layer which are sequentially stacked from bottom to top. The light-emitting device is characterized in that the reflecting layer is a gold reflecting layer, the light-emitting layer comprises any one or more of Y3Al5O12: Ce 3+ fluorescent powder,(Y, Gd)3Al5O12: Ce 3+ fluorescent powder, alpha-SiAlON: Eu 2+ fluorescent powder and (Sr, Ca) AlSiN3: Eu 2+ fluorescent powder, the doping concentration of Ce 3+ in the Y3Al5O12: Ce 3+ fluorescent powder is 1.2mol% or above, the doping concentration of Ce 3+ in the (Y, Gd)3Al5O12: Ce 3+ fluorescent powder is 0.5mol% or above, and the doping concentration of Gd 3+ is 10mol% or above.

Aiming to solve the problems that the structural design of a reading head of the absolute grating scale in the prior art is complex, and the system stability is poor, the invention discloses and provides an illuminating system for an absolute grating scale, which belongs to an illuminating system. The system includes an LED light source (5), an aperture stop (6), a planar reflecting mirror (7) and a collimating lens (8), wherein the LED light source (5) and the aperture stop (6) are coaxially arranged; the planar reflecting mirror (7) is arranged to form a 45 DEG included angle with an optical axis; and light emitted by the LED light source (5) passes through the aperture stop (6), and is reflected by the planar reflecting mirror (7), and the reflected light is incident on the collimating lens (8) and finally becomes emergent collimated light. The designed system has a simple structure, is small in volume and light in weight, and enables the emergent light rays to have excellent collimation and high parallelism.

The invention relates to an immersed imaging spectrometer based on an aberration-free holographic grating and an imaging method thereof. A light path of an optical system of the spectrometer is immersed in a high-refractive-index medium, and an optical element sequentially comprises an entrance slit, a spherical reflecting mirror, an aberration-free convex holographic grating and an imaging sensor in the light incidence direction. Light rays obtained by the long entrance slit pass through the high-refractive-index medium and then are reflected by a part of reflecting surfaces in the spherical reflecting mirror, light beams are converged and enter the aberration-free convex holographic grating, and the grating holographic aberration compensates the geometric aberration of the system; and the divergent beam split by the grating is reflected by the other part of the reflecting surface of the spherical reflecting mirror again and then converged on the imaging sensor for imaging. According to the invention, inherent geometric aberration, especially astigmatism, of a holographic aberration compensation system is utilized, an immersed optical path is adopted, the long entrance slit is realized under the limitation of compact volume, and the application requirements of wide field of view and high spectral resolution are met.