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A Simplified Two-Body Sagnac Interference Element Based on Reflective Blazed Gratings

A blazed grating and interference element technology, applied in optical elements, optics, instruments, etc., can solve the problem of unpublished reports of technical solutions, and achieve the effects of good usability, low installation accuracy, and simple and compact structure.

Inactive Publication Date: 2018-06-12
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no public report on the technical solution to meet the relevant requirements

Method used

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  • A Simplified Two-Body Sagnac Interference Element Based on Reflective Blazed Gratings
  • A Simplified Two-Body Sagnac Interference Element Based on Reflective Blazed Gratings
  • A Simplified Two-Body Sagnac Interference Element Based on Reflective Blazed Gratings

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Embodiment Construction

[0036] see figure 1 with figure 2 , the structural form of the simplified two-body Sagnac interference element based on the reflective blazed grating in this embodiment is:

[0037] The two reflective Sagnac interference units with the same structure are laid out perpendicular to each other and connected by a half-wave plate 2. The two reflective Sagnac interference units with the same structure are the first-level interference unit and the second-level interference unit respectively.

[0038] image 3 As shown, the primary interference unit is an interference unit in a vertical plane formed by the first reflective blazed grating 10 , the second reflective blazed grating 12 and the first polarizing beam splitter 11 .

[0039] Figure 4 As shown, the secondary interference unit is an interference unit in the horizontal plane formed by the third reflective blazed grating 30 , the fourth reflective blazed grating 32 and the second polarizing beam splitter 31 .

[0040] Fig...

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Abstract

The invention discloses a simplified binary Sagnac interference file based on a reflective blazed grating. The simplified binary Sagnac interference file is characterized in that two stages of reflective Sagnac interference units with same structures are arranged in a vertical mode and furthermore are connected through a half-wave plate; after polarization direction of the output of a former-stage reflective Sagnac interference unit is changed by the half-wave plate, the output of the former-stage reflective Sagnac interference unit is used as input of a later-stage reflective Sagnac interference unit, and after the output of the later-stage reflective Sagnac interference unit is polarized by a polaroid and passes through an imaging lens system, an interference is formed on an interference imaging surface. The simplified binary Sagnac interference file can realize wide-spectrum polarization interference and furthermore can satisfy the requirement of a white light polarizing interferometer. The simplified binary Sagnac interference file has advantages of small size, small weight and high suitability for application in remote sensing equipment.

Description

technical field [0001] The invention relates to a simplified two-body Sagnac interference element based on a reflective blazed grating. Background technique [0002] An interferometer is an instrument made according to the principle of light interference. Different light beams from the same light source go through different optical paths and then combine to show interference fringes. It plays an important role in spectroscopy, microbiology, analytical chemistry, physics, remote sensing science, medicine, military science, precision machinery, precision measurement and precision control. Reflection, refraction, and diffraction are mostly used in the optical path of the interferometer to realize the separation, deflection, and convergence of light. [0003] Since interferometer measurement is based on interference fringes, the visibility of interference fringes is very important to interferometers; in traditional interferometers, the main factors affecting the visibility of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/28G02B27/42
CPCG02B27/283G02B27/4233G02B27/4272
Inventor 金施群邢金玉胡鹏浩王行芳王喆
Owner HEFEI UNIV OF TECH
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