7 results about "Spectrograph" patented technology

The application discloses a filter transmittance measuring device and method based on a FOSC astronomical spectrometer, and belongs to the field of astronomical observation instrument detection and calibration, and comprises a spectrometer body, a multi-hole template, a filter mounting mechanism, a light source module and a data processing unit; wherein the multi-hole template is arranged at a focal plane and is used for dividing an image plane into a plurality of sampling sub-beams; the filter mounting mechanism at least comprises a first mounting station arranged at a rear adjacent position of the multi-hole template and a second mounting station arranged in a collimating light path, and is respectively used for measuring spatial position transmittance distribution and incident angle transmittance response of a filter to be measured. The light source module comprises a line spectrum calibration light source and a continuous spectrum measuring light source. The device and method can realize in-situ characterization of the filter in a real working light path of the FOSC astronomical spectrometer, and are especially suitable for measuring spatial uniformity and angle response of a narrow-band filter under real working conditions.

A chromatic confocal measurement device for measuring distance to an object (40; 50) includes a spectrograph (46) that converts charge carriers released from the photosensitive unit (49; 49') into voltages (V1, V2) with two different gains, such that two voltages (V1, V2) are output each time the photosensitive unit (49; 49') is exposed. An evaluation unit (30) is configured to calculate the distance value for each exposure cycle, taking into account the two voltages (V1, V2) generated by the photosensitive unit (49; 49').

The utility model discloses a portable infrared spectrometer of automatic focusing belongs to portable infrared spectrometer field, including the spectrograph body, motor support, identification screen, magnetic attraction base, positioning clamping slot, the inside installation of spectrograph body has focusing mechanism, focusing mechanism includes drive motor, ball screw, planetary gear set, bearing seat, deep groove ball bearing, sliding block, guide rail seat, linear guide rail, limit switch, and one end of drive motor is connected with ball screw, and the outside of ball screw is installed planetary gear set, bearing seat and sliding block from left to right in proper order, and bearing seat is set up with through -hole, and deep groove ball bearing is installed in through -hole, and bearing seat is connected with ball screw through deep groove ball bearing, and the both sides symmetrical installation of ball screw has guide rail seat, and the top of guide rail seat is connected with linear guide rail, and the both sides installation of linear guide rail has limit switch, and through above -mentioned each device between the cooperation use, makes the focusing process more smooth.

This invention discloses a terahertz autocorrelation near-field imaging spectroscopy system, relating to the interdisciplinary field of micro-nano photonics and terahertz photoelectric detection. The system includes: a terahertz emitter, an optical path adjustment unit, a scattering near-field scanning microscope, a terahertz receiver, a current amplifier, a lock-in amplifier, and a processor. This invention employs autocorrelation near-field imaging spectroscopy, which can obtain the time-domain information of terahertz waves by performing autocorrelation measurements on terahertz pulses. The autocorrelation near-field imaging spectroscopy method in this invention also has the ability to enhance signal intensity and suppress background noise. By controlling the optical path difference and adjusting the optical path, the two signals are accumulated to achieve a modulation of the probe resonance effect, which is beneficial for studying the resonance characteristics of the sample itself.