With position length of greater than 3m, sensitivity of better than 25μm, and nonlinear error of 0. 6% in linear range of±1. 5mm, this positioner can generate scanning 1aser beams using a PZTA, which are de-tected by a two-quadrant photocell, and then the aberration value of the signal is output-ed digitally after the photocurrent signal is processed by a monolithic processor.
With application of fringes’noise model, the SNR (signal noise ratio) analysis for new and traditional layout of photoelectric cells testifies the new ones own higher SNR and can dramatically restrain DC adrift. Ellipse fit algorithm is presentd to process the interference fringes by linear CCD.
This article focussed on how to deal with the operational problem of zero set and other troubles occurred to 751G and 721,which are widely used instruments for science reserch and production spectrscopic analysis,from cheking up source of light,checking up photodector and sensitivity. To each situation,introduced experience for trouble shooting.
A new PTEC with a two-stage photoelectric unit, which offers a higher efficiency as compared to a device with a single-stage photocell, is developed.
A new concept of the photothermoelectric converter (PTEC) is proposed, which is free of the main disadvantages (overheating of the photocell and insufficient heat flux in the thermocell) of the existing schemes.
The experimental results show that the photocell can generate large and stable photocurrent and photovoltage, the photoelectric device made from TC16PyP LB films has a potential application value.
Ants intercept a light beam as they pass under a gantry between the light source and a photocell.
Ten layers of oriented bacteriorhodopsin (BR) LB films are prepared on ITO conductive glass to constitute an ITO electrode/BR LB films/KCl solution/Cu electrode wet photocell.
A prototype Cerenkov counter, consisting of a R3432-01(similar to R5505) phototube and a quartz radiator with dimensions of 25 × 30 × 12 mm, was tested in a beam of pions and protons with a 1.19-GeV/c-momentum.
An organic scintillator and a phototube with a fine-mesh dynode system are used in the sensor.
The radiation hardness of scintillators and photomultiplier tubes and the phototube stability under long-term optic loading are analyzed.
The detection screen, the phototube and the amplifier are combined for measuring the probe-hole current.
The drum revolution of a motor-driven mycroscope micrometric eyepiece is read by means of a phototube arrangement originating calibrated electric pulses.
A simple reflectance spectrometer is described. The instrument consists of a xenon lamp as source,optical fiber for light transfer and a photo-electron tube for detection. Leaves of tree,copper sheet and semiconductor silicium sheet have been determined with the spectrometer and the results are satisfactory.
This paper daseribes the importance of test for relative spectral response characteristic ofphototllbe and silicon photocell. A'test method for relative spectral response charactoristic is suggestedin this paper. The determination instrument and two examples of application are introduced. Mean-while,relative problems about test method for silicon photocell and operation voltage of phototube arediscussed,
A study was made of thc VUV radiation photometer. A phototube with CuI cathode was used. The repro-ducibility of the photometer is satisfied. The range of spectrum is from 110nm to 200nm. The linear correlation coefficient is above 0. 99.