Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and system for measuring grating diffraction efficiency by using ellipsoidal reflecting mirror

An ellipsoid mirror and diffraction efficiency technology, which is applied in a field of measuring grating diffraction efficiency curves, can solve problems such as large space, unfavorable assembly, and increased experimental cost of the measurement system, achieving high versatility and system savings effect of space

Inactive Publication Date: 2012-07-11
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of receiving diffracted energy, this method needs to rotate the detector in a wide range with the change of the incident angle, which requires a large space for the measurement system, which is not conducive to assembling the system into an instrument for engineering measurement
At the same time, for different incident angles, two detectors fixed on the electric turntable are used for detection. Different detectors record diffraction energy to introduce errors into the diffraction efficiency curve, which also greatly increases the requirements of the measurement system for the experimental cost.
In addition, there may be measurement blind spots and judgment errors during the conversion process of the two detectors.

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
  • Method and system for measuring grating diffraction efficiency by using ellipsoidal reflecting mirror
  • Method and system for measuring grating diffraction efficiency by using ellipsoidal reflecting mirror
  • Method and system for measuring grating diffraction efficiency by using ellipsoidal reflecting mirror

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: A schematic structural diagram of a system for measuring the diffraction efficiency of a grating using an ellipsoid mirror designed by the present invention is as follows figure 2 As shown, it includes: a laser 1, a beam splitter 2, a rotary table 3, a three-dimensional adjustment frame 4, a reflective grating 5, an ellipsoid mirror 6, a second optical power detector 7, a first optical power detector 8, Beam expander collimating mirror 9.

[0031] A described workflow for realizing the system for measuring the diffraction efficiency of reflective gratings using an ellipsoid mirror is as follows: the laser beam with a wavelength of 632nm sent by the fiber-coupled output He-Ne laser 1 passes through a laser beam with a splitting ratio of 1:1. The optical fiber beam splitter 2 is divided into a first light beam and a second light beam; the light intensity P of the second light beam 1 It is detected and measured by the second optical power detector; the refl...

Embodiment 2

[0032] Embodiment 2: A schematic structural diagram of a system for measuring the diffraction efficiency of a transmission grating using an ellipsoidal transmission mirror designed by the present invention is as follows image 3 As shown, it includes: a laser 1, a beam splitter 2, a rotary table 3, a three-dimensional adjustment frame 4, an ellipsoid mirror 6, a second optical power detector 7, a first optical power detector 8, and a beam expander collimator 9. Transmission grating 10. A described workflow for realizing the system for measuring the diffraction efficiency of a transmissive grating using an ellipsoid mirror is as follows: the laser beam with a wavelength of 632nm emitted by the fiber-coupled output He-Ne laser 1 passes through a laser beam with a splitting ratio of 1:1. The optical fiber beam splitter 2 is divided into a first light beam and a second light beam; the light intensity P of the second light beam 1 It is detected and measured by the second optical p...

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 invention relates to a method and system for measuring grating diffraction efficiency by using an ellipsoidal reflecting mirror. The ellipsoidal reflecting mirror is introduced into a measuring system. The ellipsoidal reflecting mirror has the characteristic that all light emitted from a first focal point can be guided to a second focal point. A cross point between an illuminating light wave and a grating is at the first focal point of the ellipsoidal reflecting mirror. A probe of a detector is fixedly arranged at the second focal point of the ellipsoidal reflecting mirror. Therefore, light of the illuminating light wave which is injected onto the grating can be received by the probe of the detector. The system can automatically receive diffraction light energy in real time in a large angle range. The full-process automatic detection of the diffraction light energy can be realized and the space of the system is saved. The volume and the weight of the measuring system are effectively reduced and the real-time fixed-point measurement of diffraction efficiency is realized at the same time. Besides, the demands in different detection angle ranges can be met by only and comprehensively adjusting the positions of the ellipsoidal reflecting mirror, the incidence point of the grating and the probe of the detector, and the universality is very high.

Description

technical field [0001] The invention relates to a method and a system for measuring the diffraction efficiency curve of a grating, in particular to a method and a system for measuring the diffraction efficiency of a grating by using an ellipsoid mirror. Background technique [0002] Grating is an important spectroscopic optical element, which is widely used in various fields of modern optics. Using the spectroscopic properties of gratings, various devices can be made, such as grating rulers, grating spectrometers, etc. When using a grating for actual device design, it is first necessary to know the specific parameters of the grating such as grating period, grating refractive index modulation degree and effective thickness. The determination of these parameters can be obtained by studying the diffraction efficiency curve of the grating. [0003] During the measurement of grating diffraction efficiency, the diffraction angle of the grating will change with the incident angle...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
Inventor 赵建林张颜艳邸江磊姜宏振吴冰静陈鑫王骏
Owner NORTHWESTERN POLYTECHNICAL UNIV