Device and method for measuring thickness of glass through multi-beam laser heterodyne second harmonic based on Doppler oscillating mirror sinusoidal modulation
A Doppler galvanometer and sine modulation technology, applied in the field of micro-displacement detection, can solve the problems of unsatisfactory operation speed of laser difference frequency signal signal processing, and achieve the effects of fast measurement speed, high measurement accuracy, and simple and easy processing.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
specific Embodiment approach 1
[0019] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the device for measuring glass thickness by Doppler vibrating mirror sinusoidally modulating multi-beam laser heterodyne second harmonic wave in this embodiment, the device is composed of laser 1, polarizing beam splitter PBS2, quarter wave plate 3. The vibrating mirror 4, the plane mirror 5, the glass plate with the thickness to be measured 6, the converging lens 7, the photodetector 8 and the signal processing system 9 are composed. The linearly polarized light emitted by the laser 1 is reflected by the polarizing beam splitter PBS2 and then incident on the Quarter-wave plate 3, the light beam transmitted by the quarter-wave plate 3 is incident on the light-receiving surface of the oscillating mirror 4, and the light beam reflected by the oscillating mirror 4 is transmitted by the quarter-wave plate 3 again Sent to the polarizing beam splitter PBS2, the beam transmitted by t...
specific Embodiment approach 2
[0022] Embodiment 2: This embodiment is a further description of Embodiment 1, the laser 1 is H 0 solid-state lasers.
specific Embodiment approach 3
[0023] Specific embodiment three: this embodiment is a further description of embodiment one, two or three, the signal processing system 9 is composed of a filter 9-1, a preamplifier 9-2, an analog-to-digital converter A / D9-3 Composed of digital signal processor DSP9-4,
[0024] The filter 9-1 filters the received electrical signal output by the photodetector 8 and sends it to the preamplifier 9-2, and the signal amplified by the preamplifier 9-2 is output to the analog-to-digital converter A / D9-3, the analog-to-digital converter A / D9-3 sends the converted signal to the digital signal processor DSP9-4.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com