CN204671110U - Optical system in a kind of eye refractometer - Google Patents
Optical system in a kind of eye refractometer Download PDFInfo
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- CN204671110U CN204671110U CN201520082803.6U CN201520082803U CN204671110U CN 204671110 U CN204671110 U CN 204671110U CN 201520082803 U CN201520082803 U CN 201520082803U CN 204671110 U CN204671110 U CN 204671110U
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Abstract
This utility model relates to the optical system in a kind of eye refractometer, be made up of projecting light path, optical path, fixation light path and measured supervision light path, the tested eye of human body and second installs eyeglass, eyeglass installed by the 8th lens, Fourth Ring Guang Lan, the 9th lens, the 5th and ccd image sensor in same light path; Described first installs eyeglass, the second installation eyeglass is penetrated on the 3rd installation eyeglass from the aperture of light through rotary prism, corner cube prism that fundus reflex is returned; Described the 6th light installing lens reflecting is installed eyeglass, second through first and is installed the front portion that eyeglass arrives tested eye; The light of the 8th described reflection from lens installs through second the front portion that eyeglass is projeced into tested eye.The beneficial effects of the utility model are: adopt the optical system in this eye refractometer, make certainty of measurement far away higher than other eye refractometers on market.
Description
Technical field
This utility model belongs to eye refractometer technical field, particularly relates to the optical system in a kind of eye refractometer.
Background technology
The function of eye refractometer is mainly for myopia or presbyopic measurement, but because present people are very high to the required precision of measuring eyes, cause the optical system in some eye refractometer current can not meet, therefore must the optical system structure in existing eye refractometer be improved.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that prior art exists, and provides the optical system in eye refractometer that a kind of novel structure, certainty of measurement are high.
The purpose of this utility model has been come by following technical solution.Optical system in this eye refractometer, be made up of projecting light path, optical path, fixation light path and measured supervision light path, described projecting light path is installed eyeglass formed by infrared light supply, the first lens, first ring light hurdle, the second lens, the second ring light hurdle, corner cube prism, the first installation eyeglass and second successively; Described optical path installs eyeglass, the 3rd lens by rotary prism, the 3rd successively, mobile lens, the 4th installs eyeglass and the 5th installation eyeglass forms; Described fixation light path is installed eyeglass formed by visible light source, the 4th lens, fixation figure, the 5th lens, the 6th lens and the 6th successively; Described measured supervision light path is made up of infrared light, the 3rd ring light hurdle, the 7th lens, the 8th lens, Fourth Ring Guang Lan, the 9th lens, ccd image sensor successively; The tested eye of human body and second installs eyeglass, eyeglass installed by the 8th lens, Fourth Ring Guang Lan, the 9th lens, the 5th and ccd image sensor in same light path; Described first installs eyeglass, the second installation eyeglass is penetrated on the 3rd installation eyeglass from the aperture of light through rotary prism, corner cube prism that fundus reflex is returned; Described the 6th light installing lens reflecting is installed eyeglass, second through first and is installed the front portion that eyeglass arrives tested eye; The light of the 8th described reflection from lens installs through second the front portion that eyeglass is projeced into tested eye.
As preferably, also include the first back focus in described optical path, this first back focus is arranged on the 3rd between lens and mobile lens.
As preferably, also include the second back focus in described fixation light path, this second back focus is arranged between the 5th lens and the 6th lens.
As preferably, described first installs eyeglass, second installs eyeglass, the 3rd and installs eyeglass, the 4th and install eyeglass, the 5th and install eyeglass and the 6th and install eyeglass; Described first to install the light path of center and the 3rd that the center of eyeglass and the second light path and first of installing the place, center of eyeglass install eyeglass installing the place, center of eyeglass be that 45 ° of angles distribute; Described 3rd to install the light path of center and the 5th that the center of eyeglass and the 4th light path and the 4th of installing the place, center of eyeglass install eyeglass installing the place, center of eyeglass be that 70 ° of angle shapes distribute; Place, the center fixation light path that described the 6th light path and the 6th of installing the center of eyeglass and the place, center of the first installation eyeglass installs eyeglass is that 45 ° of angle shapes distribute.
The beneficial effects of the utility model are: adopt the optical system in this eye refractometer, make certainty of measurement far away higher than other eye refractometers on market.
Accompanying drawing explanation
Fig. 1 is optical system structure schematic diagram of the present utility model.
Label in accompanying drawing is respectively: 101, infrared light supply; 102, the first lens; 103, first ring light hurdle; 104, the second lens; 105, the second ring light hurdle; 106, corner cube prism; 107, first eyeglass is installed; 108, second eyeglass is installed; 201, rotary prism; 202, the 3rd eyeglass is installed; 203, the 3rd lens; 204, mobile lens; 205, the 4th eyeglass is installed; 206, the 5th eyeglass is installed; 207, the first back focus; 301, visible light source; 302, the 4th lens; 303, fixation figure; 304, the 5th lens; 305, the 6th lens; 306, the 6th eyeglass is installed; 307, the second back focus; 401, infrared light; 402, the 3rd ring light hurdle; 403, the 7th lens; 404, the 8th lens; 405, Fourth Ring Guang Lan; 406, the 9th lens; 407, ccd image sensor.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed introduction is done to this utility model: as shown in Figure 1, this utility model is made up of projecting light path, optical path, fixation light path and measured supervision light path, and described projecting light path is made up of infrared light supply 101, first lens 102, lens 104, second ring light hurdle, first ring light hurdle 103, second 105, corner cube prism 106, first installation eyeglass 107 and the second installation eyeglass 108 successively; Described optical path installs eyeglass 202, the 3rd lens 203 by rotary prism 201, the 3rd successively, mobile lens 204, the 4th installs eyeglass 205 and the 5th installation eyeglass 206 forms; Described fixation light path is installed eyeglass 306 formed by visible light source 301, the 4th lens 302, fixation Figure 30 3, the 5th lens 304, the 6th lens 305 and the 6th successively; Described measured supervision light path is made up of infrared light 401, the 3rd ring light hurdle the 402, the 7th lens 403, the 8th lens 404, light hurdle, Fourth Ring the 405, the 9th lens 406, ccd image sensor 407 successively; The tested eye of human body and second installs eyeglass 108, eyeglass 206 installed by the 8th lens 404, light hurdle, Fourth Ring the 405, the 9th lens 406, the 5th and ccd image sensor 407 in same light path; Described first installs eyeglass 107, second installation eyeglass 108 penetrates on the 3rd installation eyeglass 202 from the aperture of light through rotary prism 201, corner cube prism 106 that fundus reflex is returned; Described the 6th light installing eyeglass 306 reflection is installed eyeglass 107, second through first and is installed the front portion that eyeglass 108 arrives tested eye; The light that the 8th described lens 404 reflect installs through second the front portion that eyeglass 108 is projeced into tested eye.Described infrared light supply 101 is different from the wavelength of infrared light 401.
Also include the first back focus 207 in described optical path, this first back focus 207 is arranged between the 3rd lens 203 and mobile lens 204; Also include the second back focus 307 in described fixation light path, this second back focus 307 is arranged between the 5th lens 304 and the 6th lens 305.
Described first installs eyeglass 107, second installation eyeglass 108, eyeglass 205 installed by the 3rd installation eyeglass 202, the 4th, eyeglass 306 installed by the 5th installation eyeglass 206 and the 6th; Described first to install the light path of center and the 3rd that the center of eyeglass 107 and the second light path and first of installing the place, center of eyeglass 108 install eyeglass 107 installing the place, center of eyeglass 202 be that 45 ° of angles distribute; Described 3rd to install the light path of center and the 5th that the center of eyeglass 202 and the 4th light path and the 4th of installing the place, center of eyeglass 205 install eyeglass 205 installing the place, center of eyeglass 206 be that 70 ° of angle shapes distribute; Place, the center fixation light path that described the 6th light path and the 6th of installing the center of eyeglass 306 and the place, center of the first installation eyeglass 107 installs eyeglass 306 is that 45 ° of angle shapes distribute.
Operation principle of the present utility model is:
One, infrared light supply 101 is positioned in the focus of the first lens 102, circular target is formed through the first lens 102 and first ring light hurdle 103, and be positioned on the focal plane of the second lens 104, through the second lens 104 exiting parallel, through the two concentric ring light hurdles on the second ring light hurdle 105, reflect through corner cube prism 106 and first eyeglass 107, second is installed eyeglass 108 reflection is installed enters the tested eye of human body;
The light of two, returning from fundus reflex is installed eyeglass 108, first installation eyeglass 107 through second and is reflected and arrive the 3rd installation eyeglass 202 by the aperture rotary prism 201, corner cube prism 106, the first back focus 207 is focused on through the 3rd lens 203 after reflection, first back focus 207 is back focuses of mobile lens 204, and after mobile lens 204, exiting parallel is reflected on ccd image sensor 407 forms ring picture through the 4th installation eyeglass 205, the 5th installation eyeglass 206 again.If human eye exists dioptric not in (myopia or hypermetropia), then compensate by mobile lens 204 is movable, make circular target still focus on the first back focus 207;
Three, visible light source 301 is by the 4th lens 302 uniform illumination fixation Figure 30 3, the second back focus 307 is imaged on through the 5th lens 304, incide the 6th and install on eyeglass 306 through the 6th lens 305 are parallel, through first, eyeglass 107, second is installed after reflection and the tested eye that eyeglass 108 arrives human body is installed, during measurement tested eye watch attentively fixation Figure 30 3 can help tested eye prepare location, reduce measurement error;
Four, infrared light 401 is through the 3rd ring light hurdle 402, 7th 403 one-tenth, lens collimated light beam, reflect through the 8th lens 404, second installs eyeglass 108 projection illuminates tested front eye (upper lower eyelid, cornea and pupil position), through second, eyeglass 108 is installed again, 8th lens 404, light hurdle, Fourth Ring 405, 9th lens 406, 5th installs eyeglass 206 imaging on ccd image sensor 407, and make tested oculopupillary picture and preset point-like circle with one heart, ask and ensure the optical axis of pupil center by optical system, so just can ensure that tested eye is accurately located, reduce measurement error.
This utility model is not limited to above-mentioned embodiment; no matter do any change on its shape or material are formed; every employing structural design provided by the utility model, is all one distortion of the present utility model, all should thinks within this utility model protection domain.
Claims (4)
1. the optical system in an eye refractometer, it is characterized in that: be made up of projecting light path, optical path, fixation light path and measured supervision light path, described projecting light path is installed eyeglass (108) formed by infrared light supply (101), the first lens (102), first ring light hurdle (103), the second lens (104), the second ring light hurdle (105), corner cube prism (106), the first installation eyeglass (107) and second successively; Described optical path installs eyeglass (202), the 3rd lens (203) by rotary prism (201), the 3rd successively, mobile lens (204), the 4th installs eyeglass (205) and the 5th installation eyeglass (206) forms; Described fixation light path is installed eyeglass (306) formed by visible light source (301), the 4th lens (302), fixation figure (303), the 5th lens (304), the 6th lens (305) and the 6th successively; Described measured supervision light path is made up of infrared light (401), the 3rd ring light hurdle (402), the 7th lens (403), the 8th lens (404), Fourth Ring Guang Lan (405), the 9th lens (406), ccd image sensor (407) successively; The tested eye of human body and second installs eyeglass (108), eyeglass (206) installed by the 8th lens (404), Fourth Ring Guang Lan (405), the 9th lens (406), the 5th and ccd image sensor (407) in same light path; Described first installs eyeglass (107), the second installation eyeglass (108) is penetrated in the 3rd installation eyeglass (202) from the aperture of light through rotary prism (201), corner cube prism (106) that fundus reflex is returned; The light that the 6th described installation eyeglass (306) is reflected is installed eyeglass (107), second through first and is installed the front portion that eyeglass (108) arrives tested eye; The light that the 8th described lens (404) reflect installs through second the front portion that eyeglass (108) is projeced into tested eye.
2. the optical system in eye refractometer according to claim 1, is characterized in that: also include the first back focus (207) in described optical path, and this first back focus (207) is arranged between the 3rd lens (203) and mobile lens (204).
3. the optical system in eye refractometer according to claim 1, is characterized in that: also include the second back focus (307) in described fixation light path, and this second back focus (307) is arranged between the 5th lens (304) and the 6th lens (305).
4. the optical system in eye refractometer according to claim 1, is characterized in that: described first to install the light path of center and the 3rd that the center of eyeglass (107) and the second light path and first of installing the place, center of eyeglass (108) install eyeglass (107) installing the place, center of eyeglass (202) be that 45 ° of angles distribute; Described 3rd to install the light path of center and the 5th that the center of eyeglass (202) and the 4th light path and the 4th of installing the place, center of eyeglass (205) install eyeglass (205) installing the place, center of eyeglass (206) be that 70 ° of angle shapes distribute; Place, the center fixation light path that described the 6th light path and the 6th of installing the center of eyeglass (306) and the place, center of the first installation eyeglass (107) installs eyeglass (306) is that 45 ° of angle shapes distribute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520082803.6U CN204671110U (en) | 2015-02-05 | 2015-02-05 | Optical system in a kind of eye refractometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520082803.6U CN204671110U (en) | 2015-02-05 | 2015-02-05 | Optical system in a kind of eye refractometer |
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| CN204671110U true CN204671110U (en) | 2015-09-30 |
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| CN201520082803.6U Active CN204671110U (en) | 2015-02-05 | 2015-02-05 | Optical system in a kind of eye refractometer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106419829A (en) * | 2016-08-30 | 2017-02-22 | 宁波法里奥光学科技发展有限公司 | Optical system of full-automatic optometry unit and automatic detecting and positioning method of optical system |
| CN110558931A (en) * | 2019-10-14 | 2019-12-13 | 浙江维真医疗科技有限公司 | refractometer |
| CN110573061A (en) * | 2017-03-05 | 2019-12-13 | 沃缇奥普特蔻有限公司 | Ophthalmologic examination method and apparatus |
-
2015
- 2015-02-05 CN CN201520082803.6U patent/CN204671110U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106419829A (en) * | 2016-08-30 | 2017-02-22 | 宁波法里奥光学科技发展有限公司 | Optical system of full-automatic optometry unit and automatic detecting and positioning method of optical system |
| CN106419829B (en) * | 2016-08-30 | 2018-07-31 | 宁波法里奥光学科技发展有限公司 | A kind of optical system and its automatic detecting-positioning method of full-automatic optometry unit |
| CN110573061A (en) * | 2017-03-05 | 2019-12-13 | 沃缇奥普特蔻有限公司 | Ophthalmologic examination method and apparatus |
| CN110573061B (en) * | 2017-03-05 | 2022-08-26 | 沃缇奥普特蔻有限公司 | Ophthalmologic examination method and apparatus |
| CN110558931A (en) * | 2019-10-14 | 2019-12-13 | 浙江维真医疗科技有限公司 | refractometer |
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