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Imaging device of coherent light

An imaging device and coherent light technology, applied in optics, optical components, medical science, etc., can solve problems such as complex optical systems and complex micro-mechanical scanning devices, and achieve simple structure, convenient three-dimensional imaging, and virtual reality display Effect

Active Publication Date: 2010-07-07
南京芯视半导体有限公司
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Problems solved by technology

However, this device requires a complex and expensive micro-mechanical scanning device and a complex optical system, and in order to realize the scanning of three-dimensional images, a higher-speed row and column scanning device is required

Method used

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  • Imaging device of coherent light
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  • Imaging device of coherent light

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Embodiment Construction

[0018] figure 1 Shown in is a schematic diagram of the retinal imaging setup. The device mainly consists of a coherent light source 1 , an all-phase spatial light modulator 2 and an optical system 3 . To illustrate the retinal imaging process in detail, figure 1 Included is a simple cross-section of the eyeball with the cornea 4 , iris 5 , lens 6 and retina 7 . A more detailed model of the structure of the human eye in an optical system can be found in the literature (Reference 1: Frank , 'Handbook of lasers and optics', Springer, New York, 2007). The relevant light source 1 can be coherent light generated by gas, solid or semiconductor lasers, and the coherent light can generate plane light waves or spherical light waves through a lens. The coherent light source 1 directly illuminates the all-phase spatial light modulator 2, and the all-phase spatial light modulator 2 can be a phase only spatial light modulator (phase only spatial light modulator) with a modulation range...

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Abstract

A coherent light imaging device adopts a coherent light source 1 to irradiate an all-phase spatial light modulator 2; the coherent light transmitted by the all-phase spatial light modulator 2 is propagated through an optical system 3; the optical system transmits an optical pupil 8 in front of a cornea 4; the coherent light goes through the cornea 4, an iris 5, a lens 6, and finally reaches a retina 7; the amplitude distribution pf the coherent optical fields on a plurality of imaging planes before and behind the retina 7 is modulated by the all-phase spatial light modulator 2. The coherent light imaging device enables two-dimensional or three-dimensional images to be directly imaged the retina and has a simple structure, which can be applied to virtual reality display, augmented reality display and fundus medical diagnosis.

Description

technical field [0001] The invention relates to an imaging device, in particular to an optical imaging device which utilizes coherent light to directly form images on the retina. Background technique [0002] Traditional imaging devices use two-dimensional screens to display static or dynamic images (such as liquid crystal displays, plasma displays, projection displays, etc.), and the human visual system reimages the images on the two-dimensional screen through a lens system composed of cornea and crystals. On the retina, the human visual system can perceive the displayed image by further transmitting the image signal on the retina to the brain. [0003] Imaging the image directly on the retina can omit the two-dimensional screen, and realize virtual reality display, augmented reality display and optical coherence tomography. Researchers at the University of Washington proposed a retinal image scanning device (Reference 1: Brian T.Schowengerdt, Eric J.Seibel, 'Scannedvoxel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/22G02B27/00G02B26/08A61B3/10
Inventor 夏军雷威
Owner 南京芯视半导体有限公司
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