174results about How to "Simple light path" patented technology

The invention relates to a variable-cycle multi-beam interference photoetching method which comprises the following steps that a laser output by a laser device is reshaped, and is split into symmetrically distributed divergent beams by a beam splitting element; after passing through a collimating lens, a plurality of divergent beams are collimated into a plurality of parallel beams parallel to an optical axis; the interval between parallel beam and the optical axis is regulated through a continuous booming and expanding lens; a focusing lens focuses each beam, and a multi-beam interference pattern is formed on a focal plane; sample sheets which are coated with photo resists are arranged on the focal plane of the focusing lens so as to achieve multi-beam interference photoetching; the continuous booming and expanding lens is regulated to change the distance from each beam to the optical axis, so that the incident angle of each beam in interference is changed, and the variable-cycle multi-beam interference photoetching is obtained; and an interference exposure field is subjected to step scanning and splicing at the x-y direction through a sheet bearing platform so as to obtain the large-scale exposure. The variable-cycle multi-beam interference photoetching method provided by the invention has the advantages of easiness in regulating of a pattern cycle, capability of achieving large-area multi-beam interference photoetching and the like, and is used for the research fields of panel display, biosensing, solar batteries and self-cleaning structures.

An ophthalmoscope for viewing a fundus of an eye includes an optical lens, a ring light source configured to project light along an illumination path through the optical lens into the eye, a viewing optical system configured to view the fundus through the optical lens along a viewing optical path, wherein a portion of the viewing optical path and a portion of the illuminating optical path share a same optical axis. In addition, a fundus camera includes a viewing optical path, an imaging device, and an illuminating optical path including at least one LED and a pinhole mirror reflecting the at least one LED into the imaging device, wherein at least a portion of the illuminating optical path shares an optical axis with at least a portion of the viewing optical path.

The invention discloses a method and device for measuring thickness and refractive index of a thin film and an application thereof. The method comprises the following steps of: projecting at least three light beams onto the same point or position on the surface of a thin film sample in different incident angles, receiving intensity of a reflected light beam by an array photoelectric detector, comparing the intensity with the light intensity of an incident light beam, calculating the refractive index of each light beam, and finally fitting with a theoretical formula to obtain the thickness and the refractive index of the thin film to be measured. The device comprises a power supply, a transmission grating, a diaphragm, a condenser lens, a polarizer and a sample rotating platform are sequentially arranged along optical axis; axis of the sample rotating platform is coincided with the axis of a photoelectric detector rotating platform, wherein the diameter of the photoelectric detector rotating platform is more than the diameter of the sample rotating platform; and a photoelectric detector, a signal sampling, amplifying and AD conversion circuit and a computer which are arranged on the photoelectric detector rotating platform are sequentially connected. The method and device disclosed by the invention have the characteristics of fast measuring speed and high spatial resolution, and integrated circuits (IC) and / or functional thin-film devices can be detected in a large scale.

The invention discloses a miniaturization lens-free laser three-dimensional imaging system based on a micro-electromechanical system (MEMS) scanning micro-mirror and an imaging method thereof. The miniaturization lens-free laser three-dimensional imaging system adopts a red,green and blue three-color laser as a lighting source, three-color laser output luminous power combines into a bunch of white light to be projected on the surface of an object after modulation, red light components, green light components and blue light components in scattering light on the surface of the object are received by a photoelectric receiver group, and a distance value of a single detected pixel and a range value of three-color light components are obtained by a measuring circuit. A microcontroller calculates three-color luminous value of the single detected pixel according to the range value of the three-color light components, and a three-color real luminous value of the pixel is obtained by using a real-time distance square correction method. The microcontroller controls the MEMS micro-mirror to scan, distance values and three-color real luminous values of all pixels are obtained, a depth image and a gray level image of the object is generated by combination, and a three-dimensional colored image of the object is finally obtained. The miniaturization lens-free laser three-dimensional imaging system needs no optical lens, and is high in imaging resolution ratio, fast in speed, simple in structure and easy to miniaturize.

The invention discloses a method and a device for measuring the speed and frequency of ultrasonic traveling wave in a liquid. The method comprises the following steps that a monochromatic parallel light beam is vertical to an ultrasonic transmission direction and radiates a dynamic ultrasonic grating that the ultrasonic wave forms in the liquid; the dynamic ultrasonic grating penetrates through a lens and the diffraction spectrum of a traveling wave ultrasonic phase grating is formed; the spectrum is processed and imaged through an amplitude filter and an imaging lens, and a spectrum image of the ultrasonic traveling wave grating is obtained; the spacing of two adjacent spectral lines on the spectrum image is measured, and the wavelength of the ultrasonic wave in the liquid is calculated; the change of an electrical signal after the previous level of spectrum and zero level spectrum of the spectrum image are mixed is detected or recorded, and the frequency of the ultrasonic wave is worked out; the speed of the ultrasonic wave in the liquid is worked out through the wavelength and the frequency. The device for realizing the method comprises a light source, a transparent sink, a lens I, the amplitude filter, the imaging lens and the measuring device which are sequentially connected, and a sound-absorbing medium and the ultrasonic transducer are arranged in the transparent sink and are respectively arranged on both sides.

The invention discloses a measuring method and a measuring device for coefficients of thermal expansion. The measuring method comprises the following steps of: plating a layer of membrane which transmits light partially and reflects the light partially on upper and lower surfaces of a light transmission material to be measured respectively; heating the light transmission material; allowing a beamof monochromatic light to be incident to the light transmission material to be measured in the heating process, and reflecting the monochromatic light on the upper and lower surfaces of the light transmission material respectively, so that two beams of reflected light are interfered with each other; detecting the power of the interfered reflected light, finding a temperature value corresponding to the maximum value of the power of the reflected light, and determining the change period of the power of the reflected light in preset temperature intervals of the light transmission material; and calculating according to the change period to obtain the coefficients of thermal expansion of the light transmission material to be measured in the temperature intervals. By the measured method, the coefficients of thermal expansion of the light transmission material can be measured accurately, the test accuracy is relatively high, and system error caused by thermal expansion of sample frames and the like can be eliminated effectively; and due to the adoption of a single light source, a light path is simple, the cost is low, and the thermal expansion condition of each temperature interval can be reflected visually.

A projection system including an adjusting part, a scrolling part, and a color separating part is provided. The adjusting part adjusts the divergence angle of light emitted from a light source. The scrolling part scrolls a plurality of color bars on a light valve. The color separating part separates an incident beam, emitted from the light source and transmitted by the scrolling part, into a plurality of color beams. The adjusting part, the scrolling part, and the color separating part are sequentially arranged from the light source. Since beams of individual colors travel along a single path, the number of required optical components is reduced, thereby making the projection system compact.

The invention relates to an X-ray energy spectrum measurement method based on flat crystal diffraction imaging. By using the method, disadvantages that energy spectrum resolution is poor and measurement efficiency is low in an existing method are overcome. The method is suitable for multi-energy X-ray continuous energy spectrum measurement below 100keV. The method comprises the following steps of 1, estimating an energy spectrum scope of an X ray to be measured and determining a diffraction crystal parameter and a measurement system parameter; 2, carrying out imaging on all the diffraction angles in a diffraction angle scope and recording a diffraction image and a transmission image; 3, for a crystal determined in the step1, using a direct current X-ray source and an energy distinguishing detector to measure a rocking curve of each energy X ray to a diffraction crystal in the energy spectrum scope to be measured and calculating an integral diffraction coefficient; 4, according to the transmission image in the step2, calculating diffraction energy corresponding to each pixel of the diffraction image in the step2 so as to acquire an X-ray diffraction energy spectrum; and combining the integral diffraction coefficient of each energy to be measured in the step3 to calculate an incident X ray energy spectrum.

The invention provides a prism system and a projector. The prism system comprises a first prism and a second prism, wherein the first prism is coupled with a diamond digital micro mirror device (DMD) chip and provided with three vertical planes; the three vertical planes of the first prism are a first plane, a second plane and a third plane; the first plane is used for receiving incident light at a certain angle and refracting the incident light; the second plane is used for performing total internal reflection on the refracted incident light in the first prism; the third plane is used for refracting the reflected incident light, outputting the refracted incident light to the diamond DMD chip, receiving reflected light output by the diamond DMD chip and outputting the reflected light at different angles according to control of the diamond DMD chip; the second prism is provided with three vertical planes, and one vertical plane is parallel to the second plane; and the second prism is used for receiving the reflected light output by the first prism and outputting the reflected light according to the angle of the reflected light. The prism systems and the projector can be matched with the diamond DMD chip to realize projection.

A fundus camera includes a viewing optical path, an imaging device, and an illuminating optical path including at least one LED and a pinhole mirror reflecting the at least one LED into the imaging device, wherein at least a portion of the illuminating optical path shares an optical axis with at least a portion of the viewing optical path, and wherein the at least one LED includes a plurality of LEDs disposed in a shape of a ring.

The invention discloses a calibration system for optical beam orientation. The calibration system comprises a first optical lens, a second optical lens, a third optical lens, a fourth optical lens, an optical wedge and two optical receiving devices; an optical beam is reflected by the first optical lens and the second optical lens in sequence and passes above or below the fourth optical lens, after the optical beam is reflected by the third optical lens and the fourth optical lens, the optical beam passes above or below the third optical lens and then shines to the optical wedge, and two reflecting surfaces of the optical wedge incline to the direction of incident light beams; the optical receiving devices are used for receiving the optical beam reflected by the two reflecting surfaces of the optical wedge, and the second optical lens and the fourth optical lens are adjustable optical lenses. The invention further discloses a calibration method of the calibration system. The calibration system and the calibration method have automatic real-time calibration functions for the optical beam orientation, and the functions can serve as front-end systems for all kinds of laser precise application systems. The calibration system can record the state of a normal work optical path, and the quick and precise optical path recovery can be achieved.

The invention discloses a high sensitivity photonic crystal fiber refractive index sensor and a method for preparing the same. The sensor comprises single-mode fibers at the two ends, and a small segment of micro-tensile photonic crystal fiber which is connected with the single-mode fibers and disposed at the middle part of the sensor. The length change of the sensor after being stretched is smaller than 0.5 cm. The micro-tensile photonic crystal fiber has a solid core and an air cladding, with a length of 10-30 mm. The preparing method is that through micro stretching the photonic crystal fiber, the fiber diameter is reduced, the light field in the air is increased and the interaction between the light field and the environment is increased. The preparing method of the sensor is simple and feasible, and the sensor has a broad application prospect in fields such as optical fiber sensing. The photonic crystal fiber with a waist diameter of 30 micrometer can obtain a refractive index sensitivity of 1629.03nm / RIU at present.

The invention discloses a near-eye display device based on diffractive optical elements. The device comprises a laser used for emitting collimated coherent light, a light beam shaper used for changingthe shape and the light intensity distribution of light spots, a beam splitter, a reflective micro display screen and a lens with at least six surfaces; the first diffractive optical element capableof deflecting light rays is manufactured or attached to the first surface of the lens; and the second diffractive optical element capable of allowing the light rays to be converged is manufactured orattached to the second surface or the third surface of the lens. According to the device, the exit pupil expansion can be realized by only two diffractive optical elements, and the second diffractiveoptical element can replace a projection lens, so that an imaging light path is greatly simplified on the whole. In addition, the device integrates an eyesight correcting function, so that a user doesnot need to additionally wear eyesight correcting lenses.

The invention provides an anti-polarization-aliasing Michelson heterodyne laser vibration measuring instrument based on single acousto-optic modulation and non-polarization beamsplitting, and belongs to the field of laser interferometry. A non-polarization beamsplitter NBS is used to split beams to form a reference arm and a measuring arm. Through an acoustic optical modulator, diffraction occurs to the incident beam on the reference arm, frequency-shift first-order diffraction light is adjusted through a light beam reflex component, so propagation direction of the light beam is parallel to the direction of the incident beam. Through adjusting a reference cube-corner prism, reflected light is above the acoustic optical modulator, so that the reference light just passes through the acoustic optical modulator for one time. A measuring cube-corner prism is adjusted, so that when the reference light and the measuring light pass through the non-polarization beamsplitter NBS again, light beams are overlapped, and interference occurs. The instrument uses relatively few optical elements to realize heterodyne laser interference measurement, optical path adjustment is simple, and the instrument effectively solves problems in existing technical schemes of polarization leakage and polarization aliasing, and complex optical path adjustment. The instrument has substantial technical advantages in the field of ultra-precision vibration measurement.

The invention relates to a terahertz wave spectrum measurement device based on a filtering effect and a measurement method. By avoiding using the Fourier transformation method, there is no need to firstly acquire the time domain spectrum of to-be-measured terahertz waves and use a mechanical delay device, so the structure and the optical path are quite simple and the cost of the whole device is quite low. For filtering units corresponding to all kinds of preset filtering conditions, the terahertz waves have the same transmission wave spectrum in all emission parts and all emission directions of the filtering units. The terahertz waves are subjected to the same filtering function, so the stability of the spectrum measurement can be improved. By designing the terahertz wave spectrum measurement device based on the filtering effect and by solving of an equation system to recover the terahertz wave spectrum, the spectrum recovery scope and the resolution are free from restrictions of the movement range of a mechanical device and the repetition frequency of a femtosecond laser, so the resolution is quite high and the spectrum recovery range is quite wide.

The invention relates to a wide-range optical power meter, which includes a photoelectric detector, a photoelectric signal amplification and analog-to-digital conversion sampling circuit, and a control calculation unit. The output terminal of the photoelectric detector is connected to the input of the photoelectric signal amplification and analog-to-digital conversion sampling circuit. The output end of the photoelectric signal amplification and analog-to-digital conversion sampling circuit is connected with the input end of the control calculation unit, and the input end of the photodetector is connected with an adjustable optical attenuator for adjusting the measurement range; The control calculation unit is also connected to the adjustable optical attenuator through an attenuation control circuit. The invention only needs to use one photodetector and a set of optical signal amplification and sampling circuits to complete the purpose of wide-range optical power signal testing, and the optical path is simple.

The invention discloses a spatial variable-resolution infrared double-color imaging detection system, which comprises a double-view-field coaxial infrared double-color imaging light path system, a complex background clutter image double-color detection recognition signal processing system, an micro electro mechanical system (MEMS) scanning-based narrow-view-field imaging control system and a double-view-field image information fusion and decision system. The system mainly solves the problem that high-resolution, large-view field, real-time imaging and transmission cannot be taken into consideration at the same time in the modern optical reconnaissance, surveillance and early warning. The system has the advantages of high resolution, large view field, real-time imaging and the like, and can be used in fields of image compression, target recognition and tracking, surveillance and early warning and the like.

The invention relates to a projection display device, which comprises a light source module and a liquid crystal panel. The light source module comprises a rotating multi-surface structure and a light source, wherein the rotating multi-surface structure comprises multiple surfaces around a central axis, the number of the multiple surfaces is multiple of three, every three surfaces are one unit and are respectively provided with a red filter, a green filter and a blue filter. The light source is positioned at the central axis of the multi-surface structure. When the rotating multi-surface structure rotates around the central axis, light beams which are emitted by the light source respectively form red light, green light and blue light after being filtrated by the red filter, the green filter and the blue filter, then the lights are sequentially projected to the liquid crystal panel which converts the red light, the green light and the blue light respectively to an image with a certain single-color gray-scale according to image signals, and the image is output via an image amplification device.

The invention provides a wavefront correction method and device based on a transmission-type liquid crystal space light modulator, and solves the problem of wavefront correction difficulty of optical elements such as large-caliber telescopes and the like in the prior art. A ZYGO interferometer, a polaroid, the transmission-type liquid crystal space light modulator and a reflecting mirror are in coaxial and sequential arrangement, wherein the ZYGO interferometer is connected with a controller and a data display unit respectively; the ZYGO interferometer, a lens and the reflecting mirror are in coaxial and sequential arrangement; the ZYGO interferometer is connected with the controller and the data display unit respectively; an aperture diaphragm, a light filter, the polaroid, the transmission-type liquid crystal space light modulator, the lens and a CMOS (complementary metal-oxide-semiconductor transistor) sensor are in coaxial and sequential arrangement; the CMOS sensor is connected with a PC (personnel computer) and is used for receiving picture information; the transmission-type liquid crystal space light modulator is connected with a driving circuit, and is used for supplying electricity and transmitting information; the driving circuit is connected with the PC, and is used for displaying a measured phase and grayscale relationship graph of the transmission-type liquid crystal space light modulator onto the transmission-type liquid crystal space light modulator.

The invention discloses an endoscope fiber Raman probe and a detection device. The endoscope fiber Raman probe comprises a lens, a circular ring lens, a filtering layer, a circular ring filtering layer, a center optical fiber bundle, a Raman collection optical fiber, an optical fiber cable, a connecting piece, a center optical fiber bundle branch and a Raman collection optical fiber branch; the Raman collection optical fiber annually surrounds the center optical fiber bundle; the lens and the filtering layer are arranged at the front end of the center optical fiber bundle; the circular ring lens and the circular ring filtering layer are arranged at the front end of the Raman collection optical fiber; the combined optical fiber bundle of the Raman collection optical fiber and the center optical fiber bundle extends through the optical fiber cable; the other end of the optical fiber cable is divided into a Raman collection optical fiber bundle and an excitation / endoscope optical fiber bundle by the connecting piece. According to the endoscope fiber Raman probe disclosed by the invention, integrated design of optical fiber Raman and optical fiber endoscope is realized; the device hasthe advantages of small volume, low price, high flexibility and accurate detection, and is more applicable to biological in-vivo and in-situ Raman detection, and is relatively easy and convenient to maintain.

The invention belongs to the technical field of medical detection and especially relates to a portable micro-fluidic chip, a detection device and a micro-fluidic detection method. The portable micro-fluidic chip provided by the invention comprises a micro-fluidic chip substrate, a to-be-detected article detection chamber and a lateral polishing optical fiber; the lateral polishing optical fiber isfixedly arranged on the surface of the micro-fluidic chip substrate; a lateral polishing area of the lateral polishing optical fiber is arranged on the surface of the micro-fluidic chip substrate inthe manner of opening being upward; the to-be-detected article detection chamber is wrapped on the periphery of the lateral polishing area of the lateral polishing optical fiber, so that the to-be-detected article is placed in the lateral polishing area of the to-be-detected article detection chamber. The invention also discloses a portable micro-fluidic detection device and the micro-fluidic detection method. The invention can solve the technical defects of low detection sensitivity and accuracy of the traditional micro-fluidic chip and oversize of the micro-fluidic detection device.

The invention discloses a super-resolution microimaging system and an imaging method based on femtosecond pulse shaping. In the invention, a pulse shaping system is controlled by a computer control system so as to performing modulation in the aspects of phase position, intensity and polarization of light with different frequency components, so that femtosecond pulse laser becomes shaped pulse, ofwhich the intensity, polarization and frequency are related to time, as an exciting light; by using the exciting light for exciting a sample, particles, having different properties and types, in the sample have different response to the exciting light, so that responding intensity of a signal light relatively changes; when the pulse modulation changes, an signal light image is changed too; the computer control system, via a graphic processing algorithm, analyses and processes a plurality of the signal light images, thus acquiring a super-resolution image of the sample. The system and method overcome defects in methods in the prior art, has universality, is simple in optical path, allows wide-field observation, and is high in efficiency.

The invention relates to a handheld fundus camera based on a liquid lens. The handheld fundus camera based on the liquid lens comprises a shell, and a lighting source, an image sensor, a first lens component, a second lens component, the liquid lens, a driving circuit, a signal processing unit, a control component and a power supply component are arranged inside the shell; the signal processing unit is used for controlling the working state of the lighting source, further receiving and processing a digital signal collected by the image sensor to obtain the evaluation index of the definition of an image, and sending a control signal according to the evaluation index of the definition of the image to control the working state of the driving circuit; the driving circuit is used for receiving the control signal sent by the signal processing unit to drive the working state of the liquid lens; the power supply component is used for supplying the lighting source, the image sensor, the driving circuit, the signal processing unit and the control component with power. The handheld fundus camera based on the liquid lens is simple in structure, small in size and capable of achieving full-automatic focusing based on the feedback control of the evaluation index of the definition of the image.

The invention discloses a focusing controllable super-resolution microscopic device based on a spherical micro nano liquid drop lens; the focusing controllable super-resolution microscopic device comprises a laser, a reflector, a first lens group, a dichroscope, a linear polarizer, a microscopic object lens, a packaging box, a spherical micro nano liquid drop lens, a micro flow tube, a micro displacement bench, a sample table, a second lens group, an imaging device, and a computer control system. The computer control system controls the micro flow tube to release liquid drops of certain volumeinto the packaging box or absorb liquid drops of certain volume, thus regulating the spherical micro nano liquid drop lens radius, and zooming the spherical micro nano liquid drop lens. An existing micro nano structure focusing characteristics are uncontrollable; the focusing controllable super-resolution microscopic device based on the spherical micro nano liquid drop lens can solve said problems, uses the spherical micro nano liquid drop lens to form photon nanometer injection, and regulates the spherical micro nano liquid drop lens focusing characteristics, thus scanning samples at different depths under non-mechanical structure vibration conditions; the micro displacement bench is combined to regulate the sample table, thus scanning in the horizontal direction, and finishing three dimensional super-resolution microscopic imaging of the samples.

The invention relates to the technical field of measuring equipment for mechanical properties of materials under force, heat, electromagnetic and other multi-field coupling effect, and in particular relates to a material performance testing device and a material performance testing system. The material performance testing device comprises a heat treatment chamber, a microwave source, a microwave source control module, a holding device for a to-be-tested material, a mechanical loading device, a light source for light supplement, an infrared thermal imager for collection of the surface temperature field of the to-be-tested material and a camera for collection of the speckle image of the to-be-tested material. The material performance testing system includes the material performance testing device, a computer and a mechanical sensor which is arranged on the mechanical loading device; the computer is respectively electrically connected with the mechanical sensor, the infrared thermal imager and the camera. The temperature field and the speckle image of the to-be-tested material under the force, heat, electromagnetic and other multi-field coupling effect can be detected by the material performance testing device and the material performance testing system, further the thermal properties, full field deformation and destruction process of the to-be-tested material can be obtained, and the material performance testing device and the material performance testing system are highly intelligent.

The present invention belongs to the field of laser technology, particularly relates to a semiconductor laser, including a substrate, and lasers, fast axis collimation components, slow axis collimation components, steering compression optical systems, a polarization beam combination prism, a focusing lens and an optical fiber provided on the substrate, wherein the lasers can be arranged in two rows or one row. And lasers of the same row are all located in a same plane. Each laser is sequentially provided with a fast axis collimation component and a slow axis collimation component in the direction of an optical path. The lasers of the same row correspond to a group of steering compression optical systems used to steer and compress the light beams collimated by the fast axis collimation components and the slow axis collimation components. The polarization beam combination prism is used for combining two beams of lasers having been steered and compressed by two groups of the steering compression optical systems. And the laser combined by the polarization beam combination prism is coupled into the optical fiber by the focusing lens. The present invention has a compact structure and a simple optical path, effectively reduces the thickness of the substrate and improves the thermal dissipation capacity of the laser, so that the efficiency and reliability of the laser are improved.

The invention relates to a detection method and a detection device for the F atom concentration, wherein, a titration HP absorption spectroscopy is adopted for measuring the F atom concentration; a route selection electric excited continuous wave HP laser is adopted to be a probe light source; the absorption spectrum intensity of HF molecules in a flow field is measured through an infrared window. Because the concentration of F atoms which are dissociated by a system to be detected is certain, when the flow rate of infused hydrogen is increased gradually, the concentration of HF molecules generated can be increased along with the increase of the flow rate until all the F atoms are reacted completely, and the absorption spectrum intensity A of the HF molecules can also be increased gradually to a stable vale; when A is just a maximum value, the corresponding hydrogen flow rate is equal to the F atom concentration. Moreover, the F atom concentration can be directly calculated through the absorption spectrum intensity of the HF molecules after related parameters are obtained by fitting of data which is obtained by titration processes for many times. The invention is a detection method and a detection device for the F atom concentration with simple and convenient operation, simple and compact structure, low cost, high measuring precision and good stability.

The present invention provides a novel wavemeter on the basis of magnetic rotation effect mainly for measuring wavelength of pulse laser or continuous laser. The novel wavemeter is characterized in that the novel wavemeter is composed of a laser device to be detected, a collimator, a polarizer, a magneto-optical crystal, a permanent magnet, a polarization beam splitter, a temperature-control system, a balance photoelectric detector and a collecting and analyzing system. The laser to be detected enters into the polarizer, the magneto-optical crystal and the polarization beam splitter through the collimator orderly, and deflects with an angle corresponding to the wavelength in the polarization state of the laser to be detected of the magneto-optical crystal according to the magnetic rotation effect. Two laser beams emitted by the polarization beam splitter enters the balance photoelectric detector through a polarization maintaining fiber. The novel wavemeter on the basis of magnetic rotation effect is unique and novel in principle, does not require a mechanical movable part and a reference laser device in installation, and can measure pulsed laser. The novel wavemeter on the basis of magnetic rotation effect has good vibration resistance, small volume, and low cost. The novel wavemeter on the basis of magnetic rotation effect has simple laser path and good alignment by utilizing all-fiber.

A method of speckle size and distribution control and the optical system using the same are disclosed. The optical system is arranged inside a housing of a computer mouse that is primarily composed of a laser unit, a lens set, an image sensing unit and a digital signal processing unit. It is known that by projecting a laser beam onto a surface with sufficient roughness, the surface will exhibits a speckled appearance as the speckle pattern is a random intensity pattern produced by the mutual interference of coherent laser beam that are subject to phase differences and / or intensity fluctuations. Thus, the present invention provides an optical system capable of controlling the speckle sizes and the speckle pattern distribution by adjusting the bandwidth of a coherent laser beam being emitted out of the laser light source of the optical system as well as by adjusting the distance between an image plane of the digital signal processing unit and the rough surface being illuminated by the coherent laser beam, so that the distribution of the resulting speckle pattern and the size of each speckle thereof can match with the effective pixel size of different image sensing units used in the optical system. The method and optical system is advantageous in its simple optical path, by which the mechanical structure accuracy is minimized that facilitates and enhances manufacturers of different image sensing units to use speckle patterns for determining how far the optical system has moved and in which direction it is moved.

The invention relates to a micro device for performing on-line enrichment, elution, fluorescence labeling and detection on protein, and in particular provides a rapid protein analysis and detection device based on whole microfluidic chip closing system. The device is composed of a micro fluidic controlling system, a miniature laser induced fluorescence detection system, a microfluidic chip, an injection valve, a connecting pipeline, an interface and a data acquisition and processing part. A protein sample is enriched by an enriching column in a chip passage, is subjected to on-line fluorescence labeling operation and elution operation at the same time, and is induced by laser to be subjected to fluorescence detection. The rapid protein analysis and detection device has the advantages that the sample pre-processing process, fluorescence labeling and detection are integrated so as to enable cumbersome steps of an off-line analysis method to be omitted, the sample processing time is greatly shortened and the high sensitivity detection is achieved; the whole device is small in size and low in energy consumption; the microfluidic chip and a micro injection pump are connected through the interface with a special design; a whole fluid system runs in the closing system, the detection requirement under a special condition (such as non-gravity state) can be met. Thereby, the rapid protein analysis and detection device has the very good practical application value.