94 results about "Tungsten lamp" patented technology

The invention discloses a marine radiance meter immersion factor measurement method, which belongs to the technical field of radiation value measurement, and comprises the following steps: controlling a stable halogen tungsten lamp to irradiate towards a calibration container below the calibration container, the bottom of the calibration container is a diffuse transmission plate to generate a uniform light field, and the calibration container is filled with ultrapure water; the method comprises the following steps: firstly, measuring the radiance value of the optical window of the radiance meter just immersed under the water surface, then discharging ultrapure water in a calibration container in sequence, and obtaining the radiance value when the distance between the optical window of the radiance meter and the water surface is zi; performing water attenuation correction on a measured value in the air of the radiance meter, and extrapolating to calculate radiance when zi is equal to 0; the refractive index of the water body is calculated, and the immersion factor of the to-be-measured radiometer is calculated. According to the marine radiance meter immersion factor measuring device, the problem that in theoretical calculation, only the radiance meter optical window refractive index is considered, and different radiance meter light path design influences are ignored, so that the deviation between a theoretical calculation result and an actual value is large is solved.

1. The name of the product of this design: Solar S-shaped tungsten filament lamp 1020. 2. Purpose of this design product: for outdoor lighting. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention provides a detection method of an end face integrated reflection type SPR optical fiber biosensor manufactured based on a 2PP technology. An experiment system mainly comprises a single-mode optical fiber, an optical fiber coupler, an SPR probe, a tungsten lamp light source, a sample pool, a spectrum analyzer and a computer. The method is characterized in that a volcanic three-dimensional microstructure is directly constructed on the end face of a single-mode fiber through a 2PP technology, a metal film with the thickness of about 50nm is deposited on the inner wall of the volcanic three-dimensional microstructure, and a stable and efficient SPR excitation structure is formed; the structural parameters are subjected to FDTD simulation optimization design, and have the characteristics of high quality factor and high sensitivity. The sensor can be used for AFP detection, the sensitivity reaches 0.684 nm / (ng / mL) within the linear range of 0-10 ng / mL, the normal and risk early warning concentration interval of human serum AFP is covered, and the sensor has good biological suitability and early hepatocellular carcinoma screening capacity; in addition, the probe structure is small in size, detection can be completed only by a few microliters of liquid to be detected, and the probe is suitable for a microfluidic platform with an extremely low sample size or a clinical sampling scene. Compared with the prior art, the device has the advantages of high structural integration, high sensitivity, low sample consumption, convenience in manufacturing, stability, reliability and the like.

The invention provides an STM32-based anaerobic fermentation biogas slurry near infrared transmission spectrum data on-line acquisition device. The device comprises a backwashing anti-blocking biogas slurry filtering system and an on-line liquid near infrared spectrum acquisition system, according to the system, a three-stage filtering mechanism is adopted, an STM32 microcontroller is taken as a core, a miniature optical fiber spectrometer and a halogen tungsten lamp light source are integrated to construct a compact transmission light path, and solid particles in biogas slurry are effectively removed by combining a backwashing anti-blocking T-shaped three-way filter, a double-buffer-bottle liquid level control mechanism and a PID liquid level control strategy; the cavitation phenomenon of a biogas slurry sampling pipeline is inhibited, the stability of sample conveying and the repeatability of spectrum collection are remarkably improved, and an efficient and portable online detection solution is provided for anaerobic fermentation process control; reliable hardware support is provided for application of a near infrared spectrum detection technology in a complex anaerobic fermentation environment.

1. The name of the design product: square tungsten filament lamp. 2. The use of the design product: for lighting. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The invention discloses an automatic monochromator, and belongs to the technical field of optical instruments, the automatic monochromator comprises a monochromator shell, the upper surface of the monochromator shell is in bolted connection with a lamp chamber frame, the surface of the monochromator shell is in bolted connection with an automatic wavelength motor, and the output end of the automatic wavelength motor is fixedly connected with a grating; the outer wall of the lamp chamber frame is in bolted connection with a deuterium lamp holder, and the outer wall of the lamp chamber frame is in bolted connection with a tungsten lamp holder; and the inner wall of the monochromator shell is fixedly connected with a reflecting mirror II. When the automatic monochromator is used, visible light enters the monochromator shell through the first slit piece, passes through the second reflecting mirror and the third reflecting mirror and is gathered on the optical grating, the optical grating divides the visible light into monochromatic light, then the monochromatic light goes out of the monochromator shell through the second slit piece, the operation process is fast and convenient, and the monochromatic light is emitted out of the monochromator shell through the first reflecting mirror and the first reflecting mirror. The device has an automatic light searching structure and is high in working efficiency.

1. The name of this design product: Tungsten filament lamp (butterfly shape). 2. Purpose of the product of this design: a butterfly-shaped lamp used for indoor lighting. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The present invention relates to a method for combined radiation correction of a mercury lamp and a tungsten lamp, belonging to the technical field of correction methods. It solves the problem of the limitation of the spectral range of tungsten lamp radiation correction in the prior art. In the method of the present invention, first in a dark environment and under the conditions that the temperature, voltage, and mercury vapor pressure remain unchanged, the optical system is irradiated with a mercury lamp and a tungsten lamp respectively to obtain the characteristic radiation spectrum of the mercury lamp and the calibration radiation spectrum of the tungsten lamp. The same wavelength in the two is taken as the overlapping wavelength, and the ratio of the radiation value of the overlapping spectral line of the tungsten lamp to the radiation value of the overlapping spectral line of the mercury lamp is calculated. This ratio is used as the scaling coefficient of the radiation value of the mercury lamp. Other spectra in the characteristic radiation spectrum of the mercury lamp are scaled according to this scaling coefficient according to their fixed relative proportion relationship to obtain the calibration radiation spectrum of the mercury lamp. The radiation correction of the optical system is carried out by using the calibration radiation spectrum of the mercury lamp and the calibration radiation spectrum of the tungsten lamp to obtain the correction result. This method can expand the spectral range of radiation correction and has higher accuracy at the same time.

This application relates to the field of optical polarization measurement technology, specifically to a wide-spectrum, high-bandwidth static spectral modulation Stokes polarization measurement device, comprising a polarization modulation module, a spectral sampling module, and a high extinction ratio polarizer. The polarization modulation module includes a phase retarder and a linear polarizer; the spectral sampling module has sub-nanometer spectral resolution; the high extinction ratio polarizer includes a halogen tungsten lamp and a Glan Taylor prism for generating high-purity linearly polarized light; the obtained demodulation factor and the modulation spectrum acquired by the spectral sampling module are used to invert the Stokes parameters using zero-heterodyne coherent demodulation technology. This application employs a phase retarder with high birefringence, which, for the same thickness, produces an optical path difference tens of times greater than that of quartz, increasing the Stokes polarization measurement bandwidth by a factor of the response and improving the measurement accuracy of polarization spectral parameters. Simultaneously, the zero-heterodyne coherent demodulation method is used to eliminate the dispersion interference of the phase retarder through calibration.

The utility model discloses a manual ultraviolet monochromator assembly, which relates to the field of monochromators, and comprises a monochromator shell, the manual monochromator assembly used for adjusting monochromatic light is arranged behind the monochromator shell, the manual monochromator assembly comprises a manual wavelength knob, the top of the monochromator shell is fixedly connected with a lamp chamber shell, and the lamp chamber shell is fixedly connected with a light source. An automatic light searching assembly used for automatically searching light is arranged on the front face of the top of the lamp chamber shell. The automatic light searching assembly comprises a reflector motor body. A deuterium lamp holder is fixedly installed on the front face of the lamp chamber shell, and a deuterium lamp body is fixedly connected to the position, located in the monochromator shell, of the rear face of the deuterium lamp holder. By arranging the deuterium lamp body, the tungsten lamp body and the reflector motor body, automatic light searching and automatic light source switching of the ultraviolet monochromator can be achieved, the sun shield is arranged, unnecessary light can be shielded, the manual wavelength knob and the filter disc motor body are arranged, and wavelength can be manually and flexibly selected and accurately controlled.

The invention relates to the technical field of filament cathode materials, in particular to a tungsten carbide alloy filament, a preparation method thereof and a heating device. The tungsten carbide alloy filament comprises a base body and a carbonization layer attached to the outer surface of the base body. The grain width of the carbonized layer is 1.0 [mu] m to 15.0 [mu] m; the components of the matrix and the carbonized layer comprise a tungsten element, a carbon element, an oxygen element and an M element; the M element is selected from one or a combination of more of La, Y, Sc, Nd, Sm, Lu, Ce, Gd, Tb, Dy, Ho, Pr, Er, Tm, Yb, Eu, Hf and Zr; wherein the component of the tungsten carbide alloy filament does not contain a thorium element. The emission stability of the tungsten alloy lamp filament is improved, the stable emission capability of a traditional thorium tungsten lamp filament can be achieved under the condition that no thorium element is added, the problem that an existing tungsten lamp filament without thorium is poor in stable emission capability is solved, and the problem of radioactive contamination of the traditional thorium tungsten lamp filament is solved.

1. Name of the Design Product: Aromatherapy Tungsten Filament Lamp. 2. Use of the Design Product: For aromatherapy and night light illumination. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view.

The present invention discloses a double-tube metal sheet halogen tungsten lamp multi-station horizontal porcelain head installation device and a method for using the same. The device comprises a main operation plate horizontally arranged on the top surface of a machine platform, a mold fixing assembly arranged on the main operation plate, a mold assembly detachably connected to the mold fixing assembly, a parallelism guarantee mechanism connected to the mold fixing assembly, and a hot air system arranged on one side of the main operation plate. The double-tube metal sheet halogen tungsten lamp multi-station horizontal porcelain head installation device of the present invention can realize the automatic installation of the porcelain head of the double-tube metal sheet halogen tungsten lamp, and has a simple structure, precise size control, good consistency, high safety, and saves a lot of time for personnel operation and improves production efficiency.

The embodiment of the invention discloses a heating circuit, an aerosol generating device and a heating method thereof, and the heating circuit comprises a light heater which is used for emitting light to irradiate a to-be-heated object, thereby heating the to-be-heated object through the light; the power supply is used for supplying electric energy to the light heater; the heating circuit further comprises at least one switch element and at least one energy storage element, and the switch element is configured to receive a PWM signal and is switched on or switched off according to the level of the PWM signal, so that the light heater is connected or disconnected with the power supply; wherein the energy storage element is configured as follows: when the switch element is switched on to enable the light heater to be connected with the power supply, the energy storage element stores energy; and when the switch element is cut off to disconnect the light heater from the power supply, the energy storage element releases energy to provide electric energy for the light heater. In this way, the service life of light heaters such as a tungsten lamp can be prolonged.

The utility model discloses a light source adjusting device of a thin-layer chromatography scanner, and relates to the technical field of thin-layer chromatography scanners. The scanner comprises a scanner main body, a scanning table, a circuit board and a halogen tungsten lamp, the circuit board is installed inside the scanner main body, the halogen tungsten lamp is installed on a lamp holder of the circuit board, and a light source mechanism is arranged inside the scanner main body. The first gear drives the worm to rotate, the worm drives the worm gear to rotate, the transmission speed can be further reduced, the worm gear drives the transmission shaft to rotate, the transmission shaft drives the grating to rotate slowly and uniformly through the first rotating shaft, the situation that the grating is difficult to rotate uniformly through manual operation can be avoided, and the purpose of uniform-speed rotation is achieved. The threaded rod rotates to drive the moving block to move, the moving block drives the connecting block to move, and the connecting block drives the focusing lens to move, so that the position of the focusing lens can be adjusted to effectively focus light rays, and the purpose of improving the focusing effect is achieved.

The utility model discloses a liquid phase ultraviolet visible light detector, belongs to the technical field of liquid chromatography equipment, the liquid phase ultraviolet visible light detector comprises a case, a light source assembly, a thermal insulation layer and a monochromator assembly, the light source assembly is installed in the case, the monochromator assembly is installed at the opening of the side face of the light source assembly, and the thermal insulation layer is installed on the monochromator assembly. According to the utility model, by arranging the positions of the deuterium lamp and the tungsten lamp in the light source assembly, the orientation of the tail parts of the deuterium lamp and the tungsten lamp can be limited, the follow-up direction synchronization of the flow cell in the monochromator assembly is matched, and an operator opens the front door of the case, so that the deuterium lamp and the tungsten lamp can be conveniently operated. The tungsten lamp, the deuterium lamp and the flow cell can be clearly and visually observed, subsequent rapid replacement and maintenance are facilitated, the whole part shell does not need to be disassembled, the influence of the external temperature on equipment operation can be stably reduced in cooperation with a heat preservation layer, a temperature control fan and an air duct, and the overall accuracy of the equipment is improved.

The utility model provides a multiplexed output tungsten lamp power supply with an interface protection function, which comprises a tungsten lamp power supply body, a power supply interface is fixedly arranged on the tungsten lamp power supply body, a circuit supporting mechanism is arranged on the power supply interface, and the circuit supporting mechanism comprises a connecting arm, a limiting seat, a baffle plate and a dustproof cover. The two connecting arms are fixedly arranged on the two sides of the power interface respectively. According to the utility model, the power interface is fixedly provided with the limiting seat which can rotate along the circumferential direction of the rotating shaft, and the limiting seat is movably provided with the baffle plate through the elastic assembly, so that one end of the wire harness can be fixed by the cavity between the limiting seat and the baffle plate; when the wiring harness is collided by the outside, the impact force does not completely act on the connecting part of the wiring harness and the power interface, so that the normal connection of the wiring harness and the power interface is ensured, and the dustproof protection of the power interface is realized through the rotatable dustproof cover; therefore, the situation of short circuit between the wire harness and the power interface caused by dust accumulation at the power interface is prevented.

Disclosed in the embodiments of the present application are a heating circuit, and an aerosol generation apparatus and a heating method therefor. The heating circuit comprises: an optical heater, which is used for emitting light to irradiate an object to be heated, thereby heating said object by means of light; and a power source, which is used for providing electrical energy for the optical heater. The heating circuit further comprises at least one switching element and at least one energy storage element, wherein the switching element is configured to receive a PWM signal and turn on or off on the basis of the level of the PWM signal, thereby causing the optical heater to be connected to or disconnected from the power source; and the energy storage element is configured to store energy when the switching element is turned on to cause the optical heater to be connected to the power source, and release energy to provide electrical energy for the optical heater when the switching element is turned off to cause the optical heater to be disconnected from the power source. In this way, the service life of an optical heater, such as a tungsten filament lamp, can be prolonged.

The retro atmosphere lamp with the tungsten filament effect comprises a lamp body assembly, a light source assembly, a support assembly and a control module, and the lamp body assembly comprises an annular lamp holder, a reflecting cover, a front cover plate and a rear cover plate; the reflecting cover is arranged in the annular lamp holder, the reflecting cover is connected with the annular lamp holder through a front cover plate and a rear cover plate, and hammer textures and a 24K gold matte coating are arranged on the inner surface of the reflecting cover; the light source assembly comprises an LED chip, a fluorescent powder coating covering the LED chip and a control circuit. The fluorescent powder coating is configured to output light with the color temperature ranging from 1800 K to 2000 K. The control circuit is used for simulating brightness fluctuation of 0.1-0.3 lux; and the LED chip is positioned in the reflecting cover and is connected with the annular lamp bracket through the lamp holder assembly. According to the utility model, the color temperature and the natural fluctuation lighting effect of candlelight are simulated through the manual hammer pattern gold foil diffuse reflection structure on the inner surface of the reflecting cover and the light source assembly, so that the visual effect of a retro tungsten lamp or candlelight is vividly restored, and the requirements of theater stages, theme hotels and other scenes are met.

This utility model discloses a MINI infrared receiver head with a metal shell and through-hole, comprising a shielding shell, a receiver head body, and pins. The pins are connected to the receiver head body, and the shielding shell is fitted onto the receiver head body. The shielding shell includes an upper shielding part, a lower shielding part, a front shielding part, a left shielding part, and a right shielding part. The receiver head body is installed within a cavity formed by the upper shielding part, lower shielding part, front shielding part, left shielding part, and right shielding part. The shielding shell is a metal shielding shell. By adding a metal shielding shell around the receiver head body and installing the receiver head body within the cavity formed by the upper shielding part, lower shielding part, front shielding part, left shielding part, and right shielding part, interference from sunlight, tungsten lamp light, energy-saving lamps, and fluorescent lamps on the infrared receiving module system can be reduced, improving the product's receiving sensitivity and receiving distance. Simultaneously, it can effectively shield high-frequency electromagnetic interference, thereby improving the functionality of the infrared receiver head.

The present invention discloses a dual-light source lighting device, comprising an illumination objective lens, an iodine-tungsten lamp assembly, a collimating lens group, an LED diode assembly, and a housing. The housing houses an infrared lighting system and a visible light lighting system. The infrared lighting system comprises an illumination objective lens, an illumination reflector, and an iodine-tungsten lamp, while the visible light lighting system comprises an illumination objective lens, a diode collimator, and an LED diode. The illumination reflector has a central circular hole, and the diode collimator is embedded in the central circular hole of the illumination reflector. Both the iodine-tungsten lamp and the LED diode are mounted on the optical axis of the illumination system. The present invention utilizes a dual-light source lighting device that can simultaneously accommodate both the visible light band and the long-wave infrared band, covering the vast majority of optical instrument lighting needs.

The invention belongs to the technical field of ceramic sintering, and particularly relates to a method for preparing fine-grain ceramic through photo-thermal rapid sintering, which comprises the following steps: (1) pressing a green body and discharging glue to obtain a plain blank; (2) placing the blank on a sample table, pushing the blank into a heating chamber, and controlling a sintering atmosphere; and (3) setting light-induced heating parameters, and heating and sintering the blank in the sintering atmosphere by using a halogen tungsten lamp tube array arranged in the heating chamber as a heating source. The near-infrared halogen tungsten lamp array arranged in the heating chamber of the furnace body is used for realizing rapid heating, the power of the halogen tungsten lamps is controlled through a program, the heating and cooling speed is accurately regulated and controlled, and ceramic is promoted to form a fine grain structure and be densified; by adjusting the power of the near-infrared halogen tungsten lamp array, the temperature increasing and decreasing rate of 20-400 DEG C / s can be regulated and controlled; the device has the characteristics of low energy consumption; equipment is simple, and operation is easy; the method can be used in vacuum, inert and oxidizing atmospheres, and is wide in application scene; and the material variety and shape selection is diversified, so that the method has relatively high universality.

The invention relates to a mercury lamp and tungsten lamp combined radiation correction method, and belongs to the technical field of correction methods. The problem that the spectral range of tungsten lamp radiation correction is limited in the prior art is solved. The method comprises the following steps of: irradiating an optical system by using a mercury lamp and a tungsten lamp in a dark environment under the conditions that the temperature, the voltage and the mercury vapor pressure are not changed to obtain a mercury lamp characteristic radiation spectrum and a tungsten lamp calibration radiation spectrum, and taking the same wavelength in the mercury lamp characteristic radiation spectrum and the tungsten lamp calibration radiation spectrum as a lap joint wavelength; calculating the ratio of the radiation value of the tungsten lamp overlapping spectral line to the radiation value of the mercury lamp overlapping spectral line, taking the ratio as a scaling coefficient of the radiation value of the mercury lamp, scaling other spectrums in the characteristic radiation spectrum of the mercury lamp according to the scaling coefficient according to a fixed relative proportional relation to obtain a calibration radiation spectrum of the mercury lamp; and performing radiation correction on the optical system by using the mercury lamp calibration radiation spectrum and the tungsten lamp calibration radiation spectrum to obtain a correction result. According to the method, the radiation correction spectral range can be expanded, and the accuracy is higher.

1. The name of the design product: imitation tungsten filament bulb (3). 2. The use of the design product: the design product is used for lighting, landscape and decoration, and the outer transparent cover is made of transparent material. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

1. The name of the product of this design: Solar round tungsten filament lamp (XHY‑18). 2. Purpose of this design product: for lighting. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: Stereoscopic diagram 1.

The invention discloses a system and method for monitoring the content of plant flavonoid components in the extraction process in real time. A device comprises an extraction module, a filtering module, a constant current module, a flavone detection module and an analysis module. The flavone detection module comprises a tungsten lamp, a deuterium lamp, an optical filter 1, a flow cell, an optical filter 2, a slit and a photoelectric detector. Light emitted by the tungsten lamp and the deuterium lamp passes through the optical filter 1, the flow cell, the optical filter 2, the slit and the photoelectric detector. A plant flavone extracting solution in the extracting module enters the filtering module, an unfiltered solution in the filtering module returns to the extracting module, a filtered extracting solution in the filtering module enters the constant-speed module, one path of the extracting solution from the constant-speed module returns to the extracting module, and the other path of the extracting solution enters a flow cell of the flavone detecting module; and the extracting solution flows out of the flow cell, enters the flow velocity detection module and finally returns to the extraction module. And an absorbance vector signal formed by photoelectric detection in the flavone detection module is accessed to the analysis module. The analysis module obtains the content of the flavonoid components according to the absorbance vector signals, and the content of the flavonoid components in the extracting solution in the plant flavone extracting process is monitored in real time. The method provided by the invention solves the problem that the content of flavonoid components cannot be detected on line in a plant flavonoid extraction process, and provides a solid foundation for improving the extraction rate of the plant flavonoid components.

The invention discloses a sharp-line-free deuterium tungsten standard intensity lamp, which realizes coaxial coupling output of a deuterium lamp and a tungsten lamp through a telescopic reflector, and completes 190-3000nm broadband sharp-line-free spectrum output in cooperation with a scanning monochromator. A double-light-source short-focus lens focusing system is adopted to reduce the size of a focus point, and a high-precision telescopic regular quadrangular prism (the upper half part of which is cut along a diagonal line and is integrated with a reflector with an aluminum-plated surface) is combined to control light path switching, so that a deuterium lamp characteristic sharp line spectrum is eliminated; through seamless splicing of tungsten lamp blackbody radiation and deuterium lamp continuous ultraviolet spectrum, an output wave band covers deep ultraviolet to mid-infrared (190-3000 nm). The spectrum continuity of the light source is larger than 95%, the stability reaches + / -1% / h, the size is smaller than or equal to phi 80mm * 150mm, a multi-lamp combination calibration scheme can be replaced, and the light source is suitable for spectrum response calibration of a spectrum analyzer and environment monitoring equipment.

The invention relates to an asynchronous reference differential reflection spectrum system and method for an MOCVD (Metal Organic Chemical Vapor Deposition) rotary sample stage, and the system comprises a light source module which is used for generating a broadband spectrum light beam, the light source module comprises a halogen tungsten lamp, an LED (Light Emitting Diode) and an optical fiber beam combiner, two paths of light sources are coupled through the optical fiber beam combiner to form a broadband light source, and the light source intensity at the wave band of 400-800 nm is ensured to be proper; the incident light path module is used for aligning the light beam to the surface of a sample in the MOCVD cavity; the reference light path module is used for carrying out intensity calibration on the light beams emitted by the light source; the reflected light path module is used for converging the reflected light of the measuring light path and the reflected light of the reference light path and transmitting the converged light to the spectrum detection component; and the signal processing module is used for performing light intensity threshold judgment, spectrum average value calculation and differential reflection spectrum calculation.

The invention discloses lamp tube porcelain head gluing equipment for halogen tungsten lamp tubes, and relates to the technical field of lamp tube gluing, the lamp tube porcelain head gluing equipment comprises a vertical plate, supporting tubes and an electric telescopic rod component III, a controller component is mounted on the front surface of the vertical plate, a plurality of supporting tubes are mounted on the back surface of the vertical plate, and a rotating rod I is movably mounted on the back surface of each supporting tube in a penetrating manner; a rotating block is installed at one end of the first rotating rod, a first embedding groove is formed in the front face of the rotating block in a penetrating mode, a clamping block is installed on the front face of the vertical plate, and a second embedding groove is formed in the front face of the clamping block in a penetrating mode. According to the invention, the upper part of the bent lamp tube is fixed in the first embedding groove at the upper part, the lower part of the lamp tube is fixed in the first embedding groove at the lower part, then the porcelain head is mounted at the lower end of the lamp tube, and then the porcelain head is fixed in the second embedding groove; and then the gluing gun moves back and forth while moving left and right to glue and seal the joint of the lamp tube and the porcelain head, so that the porcelain head and the lamp tube are accurately positioned, and the positioning efficiency is high.

The utility model discloses an automatic wavelength machine which comprises a bottom plate and a monochromator assembly fixedly installed at the upper end of the bottom plate, a sample chamber assembly is fixedly installed at the upper end of the bottom plate, a tungsten lamp power supply and a deuterium lamp power supply are fixedly installed at the upper end of the bottom plate, and the tungsten lamp power supply and the deuterium lamp power supply are arranged corresponding to the sample chamber assembly and the monochromator assembly. According to the automatic wavelength machine, heat generated in the wavelength machine is rapidly transmitted through the fan, it can be guaranteed that the temperature in the wavelength machine is constant, and therefore the working stability of the wavelength machine is guaranteed, the fan can be sealed through the arrangement of a dustproof cover and a dustproof plate, dust is prevented from entering the wavelength machine, and the service life of the wavelength machine is prolonged. And when the dustproof cover and the dustproof plate are separated, heat in the wavelength machine can be transmitted outwards, heat dissipation of the wavelength machine is completed, reptiles can be prevented from entering the wavelength machine through closing of the dustproof plate, and the working safety of the wavelength machine is guaranteed.