Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Photoelectric detection circuit for single photon counting instrument

A technology of single-photon counting and photoelectric detection, which is applied in the direction of lamp circuit layout, chemiluminescence/bioluminescence, light source, etc., can solve the problems of limiting the scope of application and being unable to correctly judge the luminous intensity of the sample under inspection, and achieve performance expansion, The effect of less increase and simple circuit

Inactive Publication Date: 2005-06-01
BEIJING YUANDE BIO MEDICAL ENG
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the count output value at this time cannot be used to correctly judge the luminous intensity of the tested sample
Saturation phenomena limit the applicability of the technique

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Photoelectric detection circuit for single photon counting instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] like figure 1 As shown, according to the embodiment of the present invention, in the photodetection circuit, the photomultiplier tube 1 is composed of a photocathode K in a vacuum cover, a series of dynodes D 1 ...D n and an anode P. When photons hit the photocathode K, due to the photoelectric effect, the photocathode K emits electrons, which are sent by another series of dynodes D 1 ...D n Speed ​​up, producing more electrons on each dynode. Depending on the magnitude of the accelerating voltage and the number of dynodes, this cascading effect can produce 10 5 to 10 7 electrons. Finally, an amplified electrical signal is output on the anode for measurement. The anode P of the photomultiplier tube 1 is connected to the preamplifier 2 . The preamplifier 2 is used to amplify the electrical signal output by the electro-optic multiplier tube 1 . The output terminal of the preamplifier 2 is connected with the voltage comparator 3 . The voltage comparator 3 removes...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The photoelectric detection circuit for single photon counting instrument includes one photo detector for receiving photons and outputting electric signal; one pre-amplifier for amplifying the electric signal the photo detector outputs; one voltage comparator for cutting off the noise signal and converting the analog signal over certain level into electric pulse signal; and one counter for counting the electric pulses within certain time interval and outputting the counting number. The photoelectric detection circuit features its low-pass filter for low-pass filtering the electric signal the pre-amplifier outputs to output one DC signal, and the DC amplifier for amplifying the DC signal the low-pass filter outputs to output one current average value.

Description

technical field [0001] The invention relates to a single photon counter, in particular to a photoelectric detection circuit for the single photon counter. Background technique [0002] The determination of various hormones, drugs, vitamins, tumors and infection-related substances has become one of the routine inspection tasks in hospitals. However, the radioimmunoassay technology used in the past has problems such as short half-life, not conducive to storage, easy to cause harm to operators and the environment, and insufficient detection sensitivity. In the 1990s, a photobiological labeling and detection technology represented by chemiluminescence appeared, which was not only simple, fast, and safe, but also had higher sensitivity, so it was quickly applied to clinical diagnosis and other aspects. [0003] A single photon counter is a device that is matched with corresponding detection reagents and used for detection by chemiluminescence. It uses the single photon counting...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/76H05B37/02
CPCY02B20/40
Inventor 于晋生兰江吴晓东
Owner BEIJING YUANDE BIO MEDICAL ENG
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com