61 results about "Cold mirror" patented technology

Hybrid aircraft propulsion systems are disclosed comprising an electrically driven ducted fan, a peripheral duct or enclosure, a combustion-produced source of radiant energy, radiant energy receivers or cold mirrors, and thermophotovoltaic or thermoelectric cell energy converters. An electric motor drives a partially or completely duct enclosed fan. Downstream and within the duct enclosure, radiant energy emitters irradiated receiver fins and thermophotovoltaic cells or thermoelectric cells. The receiver fins heat and expand the fan air, and the thermophotovoltaic cells or thermoelectric cells convert the radiant energy into electrical energy which is available to charge batteries and energize the fan motor. Thrust is provided via the acceleration of air by the fan and by the acceleration of air due to heat driven expansion.

The combination of an infrared phosphor fluorescing at wavelengths between 8 μm and 13 μm with a wavelength-selective cold mirror glazing transparent to the fluoresced radiation can create a device capable of providing passive radiative cooling in tropical heat and humidity in locations with an unobstructed view of sky. The concentration of thermal radiative energy into the narrow band radiated by the phosphor, and the reflection of infrared radiation outside that band, provides more net cooling through saturation humidity at 37° C. than does a black-body or conventional selective radiator.

The invention relates to a two-tone femtosecond laser collinear pumping detecting thermal reflection system which comprises a polarization output pulse laser, a wave plate, a beam splitting element, a reflecting mirror, an electro-optical modulator, a frequency doubling crystal, an optical filter, a beam expander, an electronic control displacing platform, a cold-light mirror, a fixing adjusting frame, a focusing lens, a photoelectric detector and a filter amplifier, wherein the polarization output pulse laser is used for outputting a pulse laser; the wave plate is used for causing the laser to rotate along a polarization direction; the laser beam is divided into two mutually vertical beams along the polarization direction by the beam splitting element; the laser beam is received and reflected by the reflecting mirror; the laser beam is modulated by the electro-optical modulator; the frequency doubling crystal is used for causing the laser to generate second harmonics; the laser within an appointed wavelength interval is filtered by the optical filter; the diameter of the laser beam is expanded by the beam expander; the electronic control displacing platform can move back and forth; the laser beams with different wavelengths are combined by the cold-light mirror; a sample is fixed by the fixing adjusting frame; the laser is irradiated on the surface of the sample by the focusing lens; the photoelectric detector is used for receiving the laser passing through the optical filter and generating an electric signal; and the signal of the photoelectric detector is amplified by the filter amplifier. According to the two-tone femtosecond laser collinear pumping detecting thermal reflection system, femtosecond pulse lasers with different wavelengths are applied to pumping light and detecting light; the pumping light after being subjected to frequency doubling is filtered by the optical filter with high selective permeability; the interference of the pumping light to a detecting signal is avoided; and the accurate high-efficient measurement is realized.

The present invention provides a SF6 online monitoring apparatus accuracy detection system and a method thereof. The system comprises a gas generation apparatus, a gas container, a temperature control box, an offline type SF6 precision measurement instrument and a SF6 gas recovery device, and is characterized in that the gas generation apparatus is a gas dew point generator or standard gas, and is connected with the gas container, the gas container is provided with a thermometer, a pressure gauge and a density monitoring device, and is connected with the SF6 online monitoring device and the offline type SF6 precision measurement instrument, the offline type SF6 precision measurement instrument comprises a cold mirror type SF6 dew point meter and a SF6 decomposition product tester, and the SF6 gas recovery device is provided for detected SF 6 gas recovery. With the present invention, SF6 online monitoring apparatus accuracy detection can be achieved, detection results have traceability and high reliability, effects of the SF6 online monitoring apparatus in an electric power system can be substantially increased, and safety of the electric power system can be improved.

The present invention relates to a portable iris image acquisition device. It includes cold mirror, infrared light-emitting diode, lighting circuit, imaging lens, image sensor, imaging processing circuit, external shell and USB connecting wire. Said invention also provides their connection mode, and can be connected with computer by means of USB interface.

A radiometric system (10) typically used in semiconductor wafer processing has reduced optical losses, improved wavelength selectivity, improved signal to noise, and improved signal processing to achieve wafer temperature measurements from about 10° C. to 4,000° C. A YAG rod collection optic (12) directly couples specimen radiation (14) to a filter (18) and photo detector (20). The filter determines which radiation wavelengths are measured, and optionally includes a hot/cold mirror surface (22) for reflecting undesired radiation wavelengths back to the specimen. The detector is formed from doped GaAlAs having a peaked response near 900 nm. A signal processor (28) converts the signal into a temperature reading.

This invention relates to a cold mirror for a head-up display apparatus and provides a cold mirror that enables suppression of a phenomenon of change in color tone of an image depending on a position from which the image is viewed. This invention also provides a head-up display apparatus including the cold mirror. In a head-up display apparatus, display light of an image displayed on a display is reflected by a cold mirror and a reflected image of the image is viewed by a viewer. A relationship between an incident wavelength and a reflection phase difference in the cold mirror is set so that the reflection phase difference falls within a range of 180±60 degrees for an entire visible wavelength range of 420 to 680 nm.

The invention provides a heat-conductivity scanning system based on a pumping-detection heat reflection technology. The heat-conductivity scanning system is characterized in that laser emitted from a pulse laser passes through a first 1/2 wave plate and then is divided into two beams by a first polarized splitting prism; a laser beam I is continuously transmitted by the first polarized splitting prism, and passes through a laser frequency-doubling module, a short-wave-pass light filter, a laser modulator and a short-wave reflection mirror in sequence to reach a cold light mirror, wherein the laser modulator is connected with a signal generator; a laser beam II passes through a long-wave reflection mirror, a right-angled reflection mirror, a second 1/2 wave plate, a second polarized splitting prism and a 1/4 wave plate in sequence to reach the cold light mirror; the laser beam I and the laser beam II are converged and then reach a sample fixing frame through an objective, wherein the sample fixing frame is fixed on a three-dimensional electric moving platform which is connected with a servo motor controller; and the laser beam II is reflected by a sample, passes through the objective lens, the cold light mirror, the 1/4 light filter and the second polarized splitting prism and then is focused to a photoelectric detector by a convex lens.

A dew point apparatus of cold mirror is prepared for forming dew point chamber by coil cover, base body in separation mode, beam splitter, mirror surface and semiconductor-refrigerator; forming heat radiation unit by heat tube radiator and fan; setting DSP fuzzy controller in control unit and connecting bottom of dew point chamber to heat radiation unit.

The invention provides a polarising beam splitter using a phase difference thin film composed of liquid crystal high polymer materials, manufacturing method thereof and a liquid crystal projector using the polarising beam splitter. The polarising beam splitter (101) is composed of a first prism element (10), a second prism element (20), a polarized light separation film (PBS film), a cold mirror (40), an occluder (50) and a phase difference thin film (60). The phase difference thin film (60) is composed of a glass substrate (61), a first alignment film (62) formed on the glass substrate (61), a first liquid crystal high polymer material layer (63) superposed on the first alignment film (62), a second alignment film (64) superposed on the first liquid crystal high polymer material layer (63) and a second liquid crystal high polymer material layer (65) superposed on the second alignment film (64).

The invention relates to a multifunctional full spectrum sunlight utilizing device, which comprises a solar energy condenser, a cold mirror, an infrared light collecting module, an upper support, a lower support, a transmission cable, a fixing metal drum, a cylinder body support and a mechanical fixing and rotating control module, wherein the solar energy condenser is used for converging the sunlight and is movably connected to the mechanical fixing and rotating control module through the cylinder body support, the transmission cable is used for transmitting visible light and ultraviolet light, the cold mirror is fixedly connected between a reflecting surface of the solar energy condenser and a focal point through the lower support, the infrared light collecting module is fixedly connected at the position of an infrared light focal point of the solar energy condenser through the upper support, the upper half part of the transmission cable is fixed through the fixing metal drum fixed at the position of an opening hole at the center of the reflecting surface of the solar energy condenser, and an incident light end surface at the upper half part of the transmission cable is positioned at the position of the ultraviolet light focal point of the solar energy condenser. The multifunctional full spectrum sunlight utilizing device disclosed by the invention has the beneficial effect that the light spectrum components of the visible light, the infrared light and the ultraviolet light in a sunlight spectrum can be utilized.

The invention relates to a control method of a rapid high-precision cold mirror type dew-point instrument. A dew point chamber, a photoelectrical detecting system, a refrigerating system, a temperature measuring system and a single-chip microcomputer control processing system are included. Composite control of two control modes is adopted for the system. Firstly, a threshold value is set, and the system measures light energy of reflected light of reaction frost layer thickness in real time, calculates the difference value Rx of the current light energy and a control target value and the change rate delta Rx of the light energy and carries out fuzzy processing control if Rx is larger than the threshold value. Control processing is carried out according to a proportional-integral (PI) control rule when the error Rx is smaller than the threshold value, working current is controlled to enable the light energy to reach the control target value, the change rate of the light energy is controlled within the allowable range, proportional-integral control is stopped, and a dew point value is output. By means of fuzzy control, good transient performance can be obtained, the balance time of the system can be shortened, measurement can be accelerated, but an integration element is lacked, the system static error cannot be eliminated, errors are caused by measurement, and proportional-integral control can eliminate the system static error and improve precision. Thus, through composite application of fuzzy control and proportional-integral control, the response speed of the system is increased, and the measurement precision of the system is improved.

The invention relates to a high-accuracy dew point meter with a double optical path system. A cold mirror dew point measuring principle is adopted; a sensing system of the dew point meter comprises a temperature sensor, a double optical path detection system and an observation system; the temperature sensor is a platinum wire thermal resistive sensor; and the dew point meter also comprises a sensor preamplification circuit and a singlechip circuit. The nonlinear deviation of the dew point meter can be well corrected; meanwhile, light ray measuring sensitivity is improved, and the measuring accuracy of the dew point meter is improved.

The invention is applicable to the technical field of optics, and provides an optical system, aiming at solving the problems that an ultraviolet exposure lamp is poor in parallelism degree and energy uniformity in the prior art. The optical system comprises a UV-LED area light source component for offering an area light source, a cold light mirror for reflecting ultraviolet light emitted from the UV-LED area light source component, a compound eye light evening component for receiving and transmitting the ultraviolet light reflected from the cold light mirror, an optical mirror for receiving the ultraviolet light transmitted from the compound eye light evening component and transmitting and/or reflecting the ultraviolet light, and a reflector for receiving the ultraviolet light reflected from the optical mirror, wherein the reflector is used for reflecting the received ultraviolet light to the surface of a negative film for pattern transfer. Furthermore, the invention also provides an exposure machine. According to the optical system, since the UV-LED area source component is used for emitting the ultraviolet light and offering the area light source, and the ultraviolet light is transmitted onto the surface of the negative film in a parallel manner after being reflected by virtue of a light system, the parallelism degree and the energy uniformity of the incident ultraviolet light can be guaranteed.

The invention discloses a binocular microscope with a lighting function. The binocular microscope comprises an eyepiece lens barrel, a bracket, a tablet clamp, a base and a pillar holder. A stage is arranged on the surface of the base. A tablet clamp fixing nut is arranged on the right side of the tablet clamp. The pillar holder is arranged above the base. A pillar is arranged on the pillar holder. A focusing knob is arranged on the front surface of the bracket. A bracket locking knob is arranged on the right side of the bracket. A right angle cold mirror group is arranged above the bracket. An eyecup is arranged above the eyepiece lens barrel. According to the invention, the structure design is compact; a lamp is arranged on the right side of a rate converter; the lamp can provide the help of auxiliary lighting for a user; the bracket locking knob is arranged on the right side of the bracket; the bracket is fixed on the pillar by the bracket locking knob, which reduces the bracket jitter; the tablet clamp is arranged on the surface of the stage; and a measured object is placed under the tablet clamp for observation, which improves the work efficiency.

The invention provides a built-in detection system for sulfur hexafluoride gas humidity. The system is characterized by comprising a tank body, a mirror type sulfur hexafluoride humidity density sensor, a motor, a magnetic coupling and a fan which is arranged in the tank body, wherein a safety valve, a pressure gauge, a vacuum meter, an air inlet, an air outlet and an adapter for installing the sulfur hexafluoride humidity sensor to be detected are arranged on the tank body; the mirror type sulfur hexafluoride humidity density sensor is arranged on the inner wall of the tank body; the air outlet is connected with a dew-point meter through a valve; the magnetic coupling is embedded into the tank body, an outer rotor of the magnetic coupling is connected with an output shaft of the motor, and an inner rotor of the magnetic coupling is fixedly connected with the fan. The mirror type built-in sulfur hexafluoride sensor adopts the cold mirror principle; when the temperature of a mirror is low enough, moisture in the gas is condensed to be dew on the mirror, the temperature of the dew condensed from the moisture in the gas on the mirror is directly measured, the temperature at the moment is a dew point, and the measurement is not affected by pressure in a container, so that the measurement is more accurate, and the reproducibility is good.

A LED condense light source includes a front mount plate, a driving plate and a housing, a plurality of LED lamp beads are mounted on the front mounting plate, the LED lamp bead are electrically connected with the driving plate, and the plurality of LED lamp beads are illuminated and superimposed to form a light spot of the condensing light source at a design focus. In an exposure light source system using an LED condensing light source, a light spot is integrated and distributed through a fly-eye lens group to form a uniform multi-point light source; a cold mirror absorbs the multi-point light source transmitted by the fly-eye lens group and reflects the multi-point light source onto a spherical mirror; and the spherical mirror absorbs the reflection integration of the multi-point light source to form a surface light source, and projects the surface light source onto a worktable for exposure operation. The invention utilizes the light emitting points of a plurality of LEDs to superimpose and assemble into the light spot of a condensing light source, achieves the light intensity required for exposure, solves the exposure operation problem caused by the inconsistent attenuation of lamp beads or the failure of an LED lamp, obtains a uniform exposure light source, improves the exposure efficiency, and is suitable for the manufacture of a flexible fine circuit.

The invention relates to a method adopting photoetching mask lifting method for achieving optical coating. The method aims to realize accurate control over sizes of coating positions of different film system structures. Two light characteristics are realized on one substrate, a cold mirror is realized in a first area, light of 750 nm-800 nm cannot be transmitted in a second area, and reflection resistance of wave bands of 750 nm-800 nm is realized on one side of the coating surface. According to the invention, a corresponding photoetching mask plate is manufactured according to the lattice structure, glue application is realized through a traditional spinning-coating mode, dielectric film coating is realized in an ion-source-assisting E-Beam evaporation mode, metal Cr film coating is realized in a magnetron sputtering coating mode, and finally, photoresist is removed by soaking samples in acetone solutions. On the basis that the photoetching technology is maturely applied to the semiconductor industry, the photoetching mask lifting method is gradually applied to optical coating, and accurate control over the submicron-size structure is achieved through the photoetching mask lifting method.