Transmission type artificial crystal optical aberration hartmann measuring apparatus

An intraocular lens and transmissive technology, which is used in intraocular lens, eye testing equipment, medical science, etc. Effect

Inactive Publication Date: 2008-10-08
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

However, the application of the Hartmann wavefront sensor to the measurement of intraocular

Method used

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  • Transmission type artificial crystal optical aberration hartmann measuring apparatus
  • Transmission type artificial crystal optical aberration hartmann measuring apparatus
  • Transmission type artificial crystal optical aberration hartmann measuring apparatus

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Embodiment Construction

[0020] Such as figure 1 As shown, it is a schematic diagram of the intraocular lens aberration measurement in which the aperture division element is a microlens array in the present invention, and it includes a light source 1, a beam filtering system, an internal focusing device, an aperture division element 61, a photodetector 62 and a computer 7 , wherein the aperture division element, i.e. the microlens array 61 and the photodetector 62 constitute a Hartmann wavefront sensor, the beam filtering system consists of a pinhole 2 and a collimating mirror 3, and the inner focusing device 5 consists of two lenses with different focal lengths or mirrors to form beams that match the telescope. The light emitted by the light source 1 is filtered by the pinhole 2, collimated by the collimating mirror 3 to be parallel light output, passes through the artificial lens 4 to be tested, and the transmitted light wave carries the aberration information of the artificial lens into the interna...

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Abstract

A transmissive artificial crystal wave aberration Hartman measuring instrument mainly comprises a light source, a beam filtering system, an internal focusing mechanism, a pore opening size segmentation element, a photodetector and a computer. A Hartman wave-front sensor is composed of the pore opening size segmentation element and the photodetector. Lights given off by the light source are filtered by the beam filtering system and are emitted after being collimated into parallel lights and pass through an artificial crystal to be measured. Carrying artificial crystal wave aberration information, transmission light waves enter the internal focusing mechanism. The diopter of the artificial crystal is compensated by the internal focusing device. The compensated light waves are segmented and sampled by the pore opening size segmentation element and are focused on the photodetector to form light spot arrays. Light spot data is collected and sent to the computer to obtain the total aberration of the artificial crystal to be measured after being processed. The transmissive artificial crystal wave aberration Hartman measuring instrument has the advantage of simple and stable structure, which can provide a convenient, fast and reliable detection for the ophthalmology clinical artificial crystal transplantation and processing and the detection of artificial crystals for personalized human eye aberrations correcting.

Description

technical field [0001] The invention relates to a transmission-type artificial lens aberration Hartmann measuring instrument, which is a special device for clinical implantation of an artificial lens in ophthalmology, and is also a high-precision device for producing the artificial lens. Background technique [0002] At present, intraocular lenses have been widely used in the optical correction of high refractive errors and cataract surgery, but most of them can only correct low-order aberrations of the human eye such as defocus and astigmatism. Research shows that the human eye optical system not only has low-order aberrations, but also high-order aberrations such as coma, spherical aberration, etc. Correcting the low-order and high-order aberrations of the human eye at the same time can achieve better visual quality improvement (“Visual Performance after correcting the monochromatic and chromatic aberrations of the eye", Geun-Young Yoon and David R. Williams, J.Opt.Soc.Am....

Claims

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Application Information

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IPC IPC(8): A61F9/00A61F2/16A61B3/00
Inventor 戴云饶学军王海英张雨东王宁利熊瑛万修华
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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