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Shearing square glass prism for implementing shearing electronic speckle interference

A technology of electronic speckle interference and square prisms, applied in prisms, optics, measuring devices, etc., can solve the problems of expensive devices and poor quality of interference fringes, and achieve simple structure, low cost, and good imaging effects

Inactive Publication Date: 2009-05-13
济南铁道职业技术学院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the problems of expensive devices or poor quality of interference fringes existing in existing devices and systems used to realize shearing electronic speckle interference, the present invention provides a shearing device with low cost, good quality of interference fringes, and capable of realizing shearing electronic speckle interference. cut square prism

Method used

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  • Shearing square glass prism for implementing shearing electronic speckle interference
  • Shearing square glass prism for implementing shearing electronic speckle interference
  • Shearing square glass prism for implementing shearing electronic speckle interference

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Embodiment

[0022] Such as Figure 4 Shown, shearing square prism of the present invention is made up of two right-angled triangular prisms that ordinary optical glass grinds, and the inclined-plane of wherein a right-angled triangular prism is plated with semi-transparent and semi-reflective film, and the inclined-plane of these two right-angled triangular prisms uses optical Glue together to form a square prism. A small wedge angle α is ground off one side of the square prism to form a bevel. The wedge angle can be selected from 1′ to 20′ according to the sensitivity requirements. When grinding Grinding inwards takes the edge where the reflective surface intersects with the slope of the right-angled triangular prism as the baseline. The light incident surface and outgoing surface of the square prism are coated with anti-reflection coating, and the two reflection surfaces are coated with total reflection coating. Such as Figure 5 As shown, the incident light is reflected at a non-righ...

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Abstract

The invention provides a shearing block prism for realizing shearing electronic speckle pattern interference. The shearing block prism consists of two right-angle triangular prisms which are made by grinding common glass, an oblique plane of one right-angle triangular prism is coated with a semipermeable and half-reflection membrane, the oblique planes of the two right-angle triangular prisms are bonded together by optical cement to form the block prism, one reflection plane of the block prism is the oblique plane with a wedge angle alpha worn away, the alpha ranges from 1' to 20', a reflecting reducing coating is coated on an incident plane and an emergent plane of the block prism, and the two reflection planes are coated with a total reflection coating. In the shearing block prism, the common optical glass replaces the expensive calcite crystal in the prior art, and the shearing block prism with images misaligned is obtained by grinding the block prism made of the common optical glass. The shearing block prism realizes the shearing electronic speckle pattern interference, and has simple structure, low cost and good imaging effect.

Description

technical field [0001] The invention relates to a shearing square prism used in a shearing electronic speckle interference detection method, and belongs to the technical field of shearing square prisms for realizing shearing electronic speckle interference. Background technique [0002] The traditional shearing electronic speckle interferometry technique using the Wollaston prism as a shearing device can measure the out-of-plane displacement derivative field of the deformation of the object, and then perform non-destructive testing. At present, there are two types of devices and methods for shearing electronic speckle interference: [0003] 1. Commonly used is figure 1 Wollaston prisms shown using calcite crystals or quartz crystals [0004] The prism is composed of two right-angle prisms. When a beam of light is vertically incident on the surface of the prism, two beams of plane polarized light separated from each other and whose vibration directions are perpendicular to ...

Claims

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Application Information

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IPC IPC(8): G02B5/04G02B1/10G01B11/16G02B1/11
Inventor 高秀梅孙平刘娟陈峰林毓梁徐晓东
Owner 济南铁道职业技术学院
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