CN2683021Y - Human eyes aberration Hartmann measuring apparatus capable of eliminating stray light by using single wave reflector - Google Patents
Human eyes aberration Hartmann measuring apparatus capable of eliminating stray light by using single wave reflector Download PDFInfo
- Publication number
- CN2683021Y CN2683021Y CN 200320104747 CN200320104747U CN2683021Y CN 2683021 Y CN2683021 Y CN 2683021Y CN 200320104747 CN200320104747 CN 200320104747 CN 200320104747 U CN200320104747 U CN 200320104747U CN 2683021 Y CN2683021 Y CN 2683021Y
- Authority
- CN
- China
- Prior art keywords
- human eye
- hartmann
- reflecting mirror
- aberration
- single wavelength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
The utility model discloses a human eye aberration Hartmann measuring apparatus capable of eliminating stray light by using a single wave reflector, which is mainly composed of a microlens array and a CCD photo-coupling component detector. Beacon light passes through a collimating system (13), a rotating beacon device (12) and a focusing system (3) to go into the measured human eyes (1), the beacon light scattered by the human eyeground filters through the focusing system (3), passes through the single wave reflector (9) and a caliber matching system (10), and goes into the Hartmann measuring apparatus which makes the video signals which are output by a CCD input into a computer to calculate the aberration of human eyes. The single wave reflector (9) of the apparatus is plated with a reflecting membrane layer which only reflects wave length the same with the measuring wave to efficaciously eliminate the stray light of the external environment.
Description
This utility model belongs to armarium and makes the field.
Hartmann wave front sensor mainly is made up of a microlens array and CCD (photoelectric coupled device) detector, microlens array be placed on the conjugated plane of human eye emergent pupil face on, detector is to retinal reflex and through sampling before the light wave after the eye optical system, and each lens unit is selected the part of wavefront and form a point on the focal plane.For aberrationless eyes, the wavefront of reproduction is that picture point has a spatial distribution identical with microlens array uniformly; Under the situation that has aberration to exist, picture point is equipped with one with respect to reference bit and moves.Can be by measuring slope that picture point moves in the hope of corresponding eyes wave aberration and its zernike coefficient, thus the characteristic of human eye aberration provided.
The instrument ultimate principle: injecting ophthalmic with a branch of semiconductor laser from pupil, assemble the back through human eye and form a hot spot on the optical fundus, from the pupil ejaculation, measure the wavefront error of this Shu Guang with Hartmann wave front sensor after the scattering of optical fundus, promptly is the aberration of human eye.
When instrument was measured in bright room, the environment veiling glare will enter the Hartmann; Simultaneously, the veiling glare that the light emitting diode of the pupil imaging that is used to throw light on causes also will enter the Hartmann, influences Hartmann's certainty of measurement.In order to eliminate the above-mentioned veiling glare influence different with measuring wavelength, method commonly used is that employing adding narrow band pass filter in light path is eliminated this kind veiling glare.Because common narrow band pass filter transmitance is low, about about 50%, energy loss is big, and utilize single wavelength reflecting mirror to eliminate veiling glare mechanism, reflectance can not increase optics simultaneously greater than 95% in light path, only need the single wavelength reflectance coating of plating on existing optical element.
The purpose of this utility model is a kind of human eye aberration Hartmann measuring instrument of eliminating above-mentioned relevant veiling glare of research, to improve the certainty of measurement of instrument, is not added to the light energy that is mapped to the human eye optical fundus simultaneously.
The purpose of this utility model is to realize by following means.
Utilize single wavelength reflecting mirror to eliminate the human eye aberration Hartmann measuring instrument of veiling glare mechanism, measure aberration of human eye with Hartmann wave front sensor, mainly form Hartmann wave front sensor by a microlens array and CCD photoelectric coupled device detector, this microlens array be placed on the conjugated plane of human eye emergent pupil face on; Beacon beam enters measured human eye (1) through colimated light system (13), rotary signal device (12), focusing system (3); The beacon beam of measured human eye optical fundus scattering is through focusing system (3), through single wavelength reflecting mirror (9) 'go'gage matching system (10), enter the Hartmann, the Hartmann calculates the aberration of measured human eye (1) with the video signal input computer (16) of CCD output.Single wavelength reflecting mirror plating in instrument has the reflective coating that can only reflect with measurement phase of wave co-wavelength.
After adopting design as above, eliminate effectively and the different veiling glare of measurement wavelength.
Description of drawings is as follows:
Fig. 1 is this utility model human eye aberration Hartmann measuring instrument index path.
Fig. 2 is the cutaway view of single wavelength reflecting mirror.
Below in conjunction with accompanying drawing structure of the present invention is described in further detail.
As shown in Figure 1,1: measured human eye 2: near-infrared luminous diode 3:1 spectroscope 4: pupil image-forming objective lens 5: small ccd 6: preceding group of focusing object lens 7: back group focusing object lens 8:2 spectroscope 9: single wavelength reflecting mirror 10: bore matching system 11:1 reflecting mirror 12: rotary signal device 13: beacon beam colimated light system 14:LD semiconductor laser 15: goal systems 16: computer 17: aperture.
During instrument work, at first carrying out pupil aims at, with near-infrared luminous diode (2) measured human eye (1) pupil that throws light on, reflect by No. 1 spectroscope (3), by pupil image-forming objective lens (4) measured human eye (1) pupil is imaged on small ccd (5) target surface, with the video frequency collection card in the video signal input computer (16) of small ccd (5) output, be presented on the computer display in real time again.Adjust the instrument position, make measured human eye (1) pupil center be positioned at the instrument optical axis center, pass through the target of an infinity in No. 1 spectroscope (3), focusing system, No. 2 spectroscopes (8), single wavelength reflecting mirror (9) the object observing system (15) again with eyes by the measured, adjust focusing system, make target clear at fundus imaging.After finishing aligning, focusing, the beacon beam that sends by LD semiconductor laser (14), collimate, expand bundle by beacon beam colimated light system (13), after rotary signal device (12), No. 1 reflecting mirror (11) reflection, enter focusing system through No. 2 spectroscopes (8) reflection again, see through No. 1 spectroscope (3) at last, enter measured human eye (1); The beacon beam of measured human eye (1) optical fundus scattering sees through No. 1 spectroscope (3) and focusing system (3), see through No. 2 spectroscopes (8) again, reflect through single wavelength reflecting mirror (9), enter bore matching system (10), emergent light enters the Hartmann, in the video signal input computer (16) of Hartmann with CCD output, calculate the aberration of measured human eye (1) by computer (16).As shown in Figure 2, the single wavelength reflecting mirror (9) in instrument is gone up plating has can only reflect with the reflective coating (21) of measuring the phase of wave co-wavelength and eliminates effectively and the different veiling glare of measurement wavelength.
Also can in the bore matching system (10) of instrument, add aperture (17) in the specific implementation, aperture (17) is positioned at the public focus place of the two groups of lens in front and back of bore matching system (10), have only like this from the beacon beam of measured human eye (1) optical fundus retina scattering to see through this diaphragm, thereby eliminate the veiling glare of incident beacon beam in other optical element and tested person's cornea surface reflectance formation.
In addition, can also adopt some other method further to eliminate veiling glare in the light path, for example utilize rotary signal device (12) or immobilized eccentric orfice (annular) diaphragm, the position at the abaxial certain distance is opened in the perforate of this diaphragm, beacon beam is subjected to stopping of diaphragm, have only light with diaphragm perforate size to pass perforate and enter focusing system, see through No. 1 spectroscope (3), enter measured human eye (1) through No. 2 spectroscopes (8) reflection; When the incident beacon beam was through focusing system in this case, the reflection veiling glare on each optical element surface can not return along measuring optical axis, and human eye fundus reflex optical signal is not caused interference.
Embodiment
Adopt basic technical scheme of the present utility model, adopting wavelength on the human eye aberration Hartmann measuring instrument of our development is 0.78 μ m measuring light, single wavelength reflective coating of single wavelength reflecting mirror (9) plating 0.78 mum wavelength is effectively eliminated the veiling glare influence different with measuring wavelength.
Claims (2)
1, utilize single wavelength reflecting mirror to eliminate the human eye aberration Hartmann measuring instrument of veiling glare mechanism, mainly form by a microlens array and CCD photoelectric coupled device detector, this microlens array be placed on the conjugated plane of human eye emergent pupil face on; Beacon beam enters measured human eye (1) through colimated light system (13), rotary signal device (12), focusing system (3); The beacon beam of measured human eye optical fundus scattering is through focusing system (3), through single wavelength reflecting mirror (9) 'go'gage matching system (10), enter the Hartmann, the Hartmann is with the video signal input computer (16) of CCD output, calculate the aberration of measured human eye (1), it is characterized in that the single wavelength reflecting mirror (9) in instrument is gone up plating only reflection and the reflective coating of measuring the identical wavelength of wavelength.
2, eliminate the human eye aberration Hartmann measuring instrument of veiling glare mechanism according to the single wavelength reflecting mirror of the described utilization of claim 1, it is characterized in that, adding in the bore matching system (10) of instrument has aperture (17), aperture (17) to be positioned at the public focus place of the two groups of lens in front and back of bore matching system (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320104747 CN2683021Y (en) | 2003-12-31 | 2003-12-31 | Human eyes aberration Hartmann measuring apparatus capable of eliminating stray light by using single wave reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320104747 CN2683021Y (en) | 2003-12-31 | 2003-12-31 | Human eyes aberration Hartmann measuring apparatus capable of eliminating stray light by using single wave reflector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2683021Y true CN2683021Y (en) | 2005-03-09 |
Family
ID=34599216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320104747 Expired - Fee Related CN2683021Y (en) | 2003-12-31 | 2003-12-31 | Human eyes aberration Hartmann measuring apparatus capable of eliminating stray light by using single wave reflector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2683021Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335950A (en) * | 2013-06-24 | 2013-10-02 | 中国科学院光电技术研究所 | Device and method for measuring atmospheric turbulence non-isoplanatic wavefront error and turbulence characteristic parameters |
| CN112043233A (en) * | 2020-09-27 | 2020-12-08 | 中国科学院光电技术研究所 | Eye scattering objective measuring instrument capable of eliminating eye aberration influence |
-
2003
- 2003-12-31 CN CN 200320104747 patent/CN2683021Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335950A (en) * | 2013-06-24 | 2013-10-02 | 中国科学院光电技术研究所 | Device and method for measuring atmospheric turbulence non-isoplanatic wavefront error and turbulence characteristic parameters |
| CN103335950B (en) * | 2013-06-24 | 2015-02-25 | 中国科学院光电技术研究所 | Device and method for measuring atmospheric turbulence non-isoplanatic wavefront error and turbulence characteristic parameters |
| CN112043233A (en) * | 2020-09-27 | 2020-12-08 | 中国科学院光电技术研究所 | Eye scattering objective measuring instrument capable of eliminating eye aberration influence |
| CN112043233B (en) * | 2020-09-27 | 2023-12-22 | 中国科学院光电技术研究所 | Human eye scattering objective measuring instrument capable of eliminating human eye aberration influence |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3488002B2 (en) | Measuring device for intraocular distance | |
| CN101766472B (en) | Liquid crystal adaptive retinal imaging optical system for aberration correction with self-regulating visibility | |
| US8459795B2 (en) | Measuring system for ophthalmic surgery | |
| CN102429636B (en) | Crystal liquid self-adaptive optical fundus imaging system with large field of view | |
| CN102215738B (en) | Measuring system for ophthalmic surgery | |
| CN101803906B (en) | Automatic defocusing compensation human eye aberration Hartmann measuring instrument | |
| CN102499633B (en) | Large-visual-field liquid-crystal self-adapting optical eyeground imaging method | |
| CN100391398C (en) | Device for measuring aberrations in an eye-type system | |
| US4257687A (en) | Eye examining instrument with photo-detecting system | |
| CN101596096A (en) | Heed contacted measure eyes axial length and/or corneal curvature and/or anterior chamber depth, the apparatus and method measured of IOL especially | |
| CN101612033A (en) | Heed contacted measure eyes axial length and/or corneal curvature and/or anterior chamber depth, the apparatus and method measured of IOL especially | |
| FR2865371A1 (en) | Sight device for patient eye testing system, includes movable target displayed on screen of desktop computer, where target is visible to eye of subject during testing period | |
| CN101259009A (en) | Corneal topography measuring instrument | |
| CN113440099B (en) | Comprehensive human eye vision inspection device and method | |
| WO2016203212A2 (en) | Optical system | |
| CN100450431C (en) | Human eye aberration and corneal surface shape measuring system based on micro-prism array shack-Hartmann wavefront sensor | |
| CN113876295A (en) | Multi-mode double-off-axis retina imaging device and method | |
| US5900928A (en) | Confocal bidirectional laser doppler velocimetry | |
| US5980041A (en) | Point of observation tracking device and eye focus measuring device | |
| CN2683021Y (en) | Human eyes aberration Hartmann measuring apparatus capable of eliminating stray light by using single wave reflector | |
| CN102389290B (en) | Frequency-domain optical coherence tomography system | |
| JP2003000541A (en) | Schematic eye for optometric apparatus | |
| CN208892542U (en) | Optical coherence tomography and the confocal synchronous imaging system of spot scan | |
| US20220206208A1 (en) | Devices for producing luminous distributions with optical waveguides | |
| CN108567409A (en) | A kind of off axis reflector mirror retina imaging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |