Photoelectric scanner

A technology of optical devices and light sources, applied in the optical field, can solve the problems of the exit angle and exit position of unseen light, and achieve the effect of improving quality

Active Publication Date: 2019-04-02
JIANGSU INTELIGHT ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the electro-optic effect is usually used to realize the modulation of the phase, amplitude, intensity, and polarization state of the optical signal, but there is no modulation of the emission angle and emission position of the light.

Method used

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Embodiment 1

[0040] According to an optical scanning device provided by the present invention, the purpose of beam scanning is realized by changing the effective refractive index of the birefringent medium in the device and changing the angle and / or position of outgoing light. The device may be a waveguide device whose cross-sectional shape is triangular or wedge-shaped. It has at least two surfaces, and the two surfaces are not parallel. The substrate on the surface can apply voltage, and the middle is filled with a birefringent material (such as liquid crystal). When the electric field of the substrates at both ends changes, the equivalent refractive index of the middle material will also change. Changes occur, thereby changing the outgoing direction and / or position of the incident light beam to realize scanning. Applying a voltage to change the refractive index of the material can be achieved by two methods or their combination (ie, two driving methods and their combination).

[0041] ...

Embodiment 2

[0049]A device for optical scanning, which is a wedge-shaped waveguide. The upper substrate and the lower substrate (referred to as the upper and lower substrates) use ITO glass. The upper and lower substrates are not parallel and are equipped with electrodes. A PI film is prepared on the inner side of the substrate, which is aligned and positioned by the rubbing method (use a felt to rub the PI film on the glass substrate in a specific direction), the alignment directions of the upper and lower substrates are consistent (ECB mode), and the four sides are sealed and filled in the middle liquid crystal material. A triangular prism made of a material with the same or similar refractive index is glued on the lower substrate of the device with optical glue having the same or similar refractive index as the lower substrate, and the incident light is guided into the waveguide through the triangular prism. The light source uses semiconductor lasers, such as 808nm or 1550nm lasers, an...

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Abstract

The invention provides an optical device, which has at least two non-parallel surfaces with a birefringent material between the two surfaces. The invention also provides an optical system and a control system. The invention changes the emitting parameters of the emitted light by applying a change and / or period of the voltage to implement a scanning function. Further, the invention improves the quality of the scanning by synchronizing the optical device and a light source through the control system.

Description

technical field [0001] The invention relates to the field of optics, in particular to an optical device, an optical system and a control system. Background technique [0002] The basis of electro-optic modulators is the electro-optic effect. According to the relationship between the refractive index change of the electro-optic crystal and the applied electric field strength, the electro-optic effect can be divided into a linear electro-optic effect (Pockels effect) and a secondary electro-optic effect (Kerr effect). Because the linear electro-optic effect is more effective than the secondary electro-optic effect, in practice, a linear electro-optic modulator is often used to modulate the light wave. Linear electro-optic modulators can be divided into vertical and horizontal. In longitudinal modulators, the electric field is parallel to the direction of light propagation, while in transverse modulators the electric field is perpendicular to the direction of light propagatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1333G02F1/133
CPCG02F1/13306G02F1/1333
Inventor 谈顺毅
Owner JIANGSU INTELIGHT ELECTRONICS TECH
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