CN114152412A - Optical delay line device and ophthalmic biological multi-parameter measuring instrument - Google Patents
Optical delay line device and ophthalmic biological multi-parameter measuring instrument Download PDFInfo
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- CN114152412A CN114152412A CN202111441756.6A CN202111441756A CN114152412A CN 114152412 A CN114152412 A CN 114152412A CN 202111441756 A CN202111441756 A CN 202111441756A CN 114152412 A CN114152412 A CN 114152412A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 71
- 230000000694 effects Effects 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 5
- 230000008520 organization Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 208000002177 Cataract Diseases 0.000 description 1
- 101150090425 SLD1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000001491 myopia Diseases 0.000 description 1
- 230000004379 myopia Effects 0.000 description 1
- 238000002281 optical coherence-domain reflectometry Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
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Abstract
The invention relates to an optical delay line device, which comprises a cylindrical mirror, a reflecting mirror and a prism; the prism, the cylindrical mirror and the reflector are sequentially arranged on an incident light path; the prism is arranged on a movable mechanism for driving the right-angle prism to move. Through the structure, the scanning range of the optical delay line is increased by changing the right-angle prism, the large-range scanning of the optical path is achieved by using a device combining the square prism and the right-angle prism, the required optical path scanning range can be obtained by increasing the number of the right-angle prisms according to actual needs, and meanwhile, the structure of the delay line device can be compact. The optical delay line device can be applied to measurement of an ophthalmologic biological multi-parameter measuring instrument and measurement of a geometric value of a transparent or diffusion object.
Description
Technical Field
The invention relates to the technical field of optical delay, in particular to an optical delay line device and an ophthalmological biological multi-parameter measuring instrument.
Background
Most of the external perception and knowledge of the human being is obtained by the eyes, and the health of the human eyes is of paramount importance. The biological parameters of the eyes can be clinically used for diagnosing a plurality of diseases of the eyes, such as myopia, cataract and the like, so that how to quickly and accurately acquire the biological parameters of the eyes has important significance.
The optical delay line is an optical device capable of changing the optical path, and the optical delay line is required to be adopted to change the optical path on an instrument utilizing a broadband optical interference distance measurement principle, so that the optical path between a measurement optical path and a reference optical path meets the low-coherence optical interference condition, and the measurement is completed. In recent years, a broadband optical interference distance measurement principle is mainly a Low Coherence reflection technology (OLCR), and a spatial position of a sample to be measured is positioned by interference through measuring reflected light of the sample to be measured and light returned by an optical delay line.
The prior optical delay line technical patent mainly comprises a hollow pyramid prism optical delay line device (CN 102736234A) with an endogenous scale light source, and the patent mentions that a motor is adopted to rotate a right-angle prism to reflect light, and different angles correspond to different optical paths, so that the change of the optical paths is realized;
in the method and apparatus for determining the geometry of an object (US 20090268209 a) the patent uses a rotating square prism to effect a change in the optical path of the incident light;
periodic scanning optical delay lines (CN 101430422 a) based on tilted parabolic bus spiral mirrors reflect incident light with tilted parabolic bus spiral mirrors so that the optical path length changes.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide an optical delay line device of an ophthalmologic biological multi-parameter measuring instrument, which can be applied to measurement of the ophthalmologic biological multi-parameter measuring instrument.
In order to achieve the purpose, the invention adopts the following technical scheme:
an optical delay line device comprises a cylindrical mirror, a reflecting mirror and a prism; the prism, the cylindrical mirror and the reflector are sequentially arranged on an incident light path; the prism is arranged on a movable mechanism for driving the right-angle prism to move.
Preferably, the movable mechanism is a turntable, and the right-angle prism is arranged on the turntable.
Preferably, the prism is a right angle prism.
Preferably, the right-angle prisms are provided with more than two prisms, and the right-angle prisms can be assembled into prisms with other shapes or the prisms are sequentially arranged on the turntable and are positioned on the light path.
Preferably, the right angle prism is a solid right angle prism.
Preferably, the number of the right-angle prisms is two, and the two right-angle prisms form a quadrangular prism; the quadrangular prism is arranged on the turntable.
Preferably, the prism is a polygonal prism.
Preferably, the polygonal prism is an octagonal prism.
Preferably, the prism includes a right-angle prism and an eight-prism, and the right-angle prism and the eight-prism are sequentially disposed on the incident light path.
An ophthalmology biological multi-parameter measuring instrument comprises the optical delay line device.
The invention has the following beneficial effects:
through the structure, the scanning range of the optical delay line is increased by changing the right-angle prism, the large-range scanning of the optical path is achieved by using a device combining the square prism and the right-angle prism, the required optical path scanning range can be obtained by increasing the number of the right-angle prisms according to actual needs, and meanwhile, the structure of the delay line device can be compact. The optical delay line device can be applied to measurement of an ophthalmologic biological multi-parameter measuring instrument and measurement of a geometric value of a transparent or diffusion object.
Drawings
The invention is explained in more detail below with reference to the figures and examples.
FIG. 1 is an optical path diagram of a right angle prism optical delay line;
FIG. 2 is an optical path diagram of a solid right angle prism optical delay line;
FIG. 3 is an optical diagram of a four-prism optical delay line;
FIG. 4 is an optical path diagram of an eight-prism optical delay line;
fig. 5 is an optical path diagram of an optical delay line combining a quadrangular prism and a rectangular prism.
Wherein:
1-SLD superluminescent light emitting diode; 2-a right angle prism 1; 3-a right angle prism 2; 4-a turntable; 5-cylindrical mirror; 6-mirror. 7-a quadrangular prism; 8-octagonal prism; 9-clamping.
Detailed Description
In order to make the technical problems solved, technical solutions adopted, and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention are described in further detail below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, an optical delay line device according to the present invention includes a cylindrical mirror, a reflecting mirror and a prism; the prism, the cylindrical mirror and the reflector are sequentially arranged on an incident light path; the prism is arranged on a movable mechanism for driving the right-angle prism to move.
As shown in fig. 1, the prism is a right angle prism. The SLD (Super-luminescent diodes) light source is reflected by the right-angle prism and converged to the reflector original path to return through the cylindrical mirror, when the turntable rotates, the right-angle prism rotates to the position of the right-angle prism, incident light is reflected to the cylindrical mirror through the right-angle prism and returned by the reflector original path, and the optical path of the incident light is changed due to the rotation of the turntable, so that the effect of an optical delay line is achieved.
In fig. 2, the right-angle prism is a solid right-angle prism, and because the right-angle prism has a refractive index, the scanning range of the optical path can be increased on the basis of fig. one.
The right-angle prisms may be provided with more than two, and the right-angle prisms may be assembled into prisms of other shapes or the prisms may be sequentially arranged on the turntable and located on the light path.
As shown in fig. 3, two solid rectangular prisms can be spliced into a quadrangular optical delay line, the quadrangular prism is arranged on the turntable, when the SLD light source enters the quadrangular prism, the SLD light source is refracted, then totally reflected inside the quadrangular prism, reflected once, and finally refracted out to the cylindrical mirror, and then converged to the original path of the reflector through the cylindrical mirror and returned to the light source, when the turntable drives the quadrangular prism to rotate, the angle of the incident light increases, and the optical path that the incident light travels inside the quadrangular prism increases, so that the optical path scanning effect of the optical delay line is achieved.
The prism may also be a polygonal prism, such as an octagonal prism. As shown in fig. 4, the SLD light source enters the octagonal prism, first undergoes a refraction, then undergoes two reflections, and finally exits to the cylindrical mirror, and then converges to the original path of the reflecting mirror and returns to the light source through the cylindrical mirror.
The prism may include a right-angle prism and a quadrangular prism, which are sequentially disposed on the incident light path. As shown in fig. 5, an optical delay line is generated by combining a quadrangular prism and a right-angle prism, light reflected by the quadrangular prism from the SLD light source 1 is incident on the right-angle prism, reflected by the right-angle prism back to the quadrangular prism, reflected by the quadrangular prism and incident on the cylindrical mirror to be converged on the reflecting mirror and return to the SLD1 light source, so that the delay effect of light can be increased repeatedly, and the number of the right-angle prisms can be increased at the reflecting mirror according to actual needs to realize a large-range optical delay effect, thereby obtaining a large-range optical delay effect and enabling the whole system structure to be compact.
The ophthalmic biological multi-parameter measuring instrument comprises the optical delay line device.
Through the structure, the scanning range of the optical delay line is increased by changing the right-angle prism, the large-range scanning of the optical path is achieved by using a device combining the square prism and the right-angle prism, the required optical path scanning range can be obtained by increasing the number of the right-angle prisms according to actual needs, and meanwhile, the structure of the delay line device can be compact. The optical delay line device can be applied to measurement of an ophthalmologic biological multi-parameter measuring instrument and measurement of a geometric value of a transparent or diffusion object.
The terms "comprises" and "comprising," as well as any variations thereof, referred to in the description herein, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to the listed steps or modules but may alternatively include other steps or modules not listed or inherent to such process, method, article, or apparatus. The terms "first" and "second" herein are used merely for descriptive purposes and are not intended to have a special meaning.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (10)
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| CN202111441756.6A CN114152412A (en) | 2021-11-29 | 2021-11-29 | Optical delay line device and ophthalmic biological multi-parameter measuring instrument |
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| CN202111441756.6A CN114152412A (en) | 2021-11-29 | 2021-11-29 | Optical delay line device and ophthalmic biological multi-parameter measuring instrument |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002310898A (en) * | 2001-04-13 | 2002-10-23 | Japan Science & Technology Corp | High-speed optical delay generation method using rotating reflector in optical coherence tomography and its high-speed optical delay generation device |
| US20030011782A1 (en) * | 2000-02-18 | 2003-01-16 | Naohiro Tanno | Optical interference tomographic image observing apparatus |
| CN102520505A (en) * | 2011-12-04 | 2012-06-27 | 中国科学院光电技术研究所 | Prism-based double-pass optical delay line |
| CN111158139A (en) * | 2020-02-22 | 2020-05-15 | 中国工程物理研究院流体物理研究所 | Ultra-high-speed rotating prism optical fiber delay line for real-time terahertz medical imaging |
| CN111184502A (en) * | 2020-01-08 | 2020-05-22 | 上海美沃精密仪器股份有限公司 | Method and apparatus for generating fast scanning optical phase delay line |
| CN211697497U (en) * | 2019-12-24 | 2020-10-16 | 上海雄博精密仪器股份有限公司 | Time-domain optical coherence tomography system |
-
2021
- 2021-11-29 CN CN202111441756.6A patent/CN114152412A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030011782A1 (en) * | 2000-02-18 | 2003-01-16 | Naohiro Tanno | Optical interference tomographic image observing apparatus |
| JP2002310898A (en) * | 2001-04-13 | 2002-10-23 | Japan Science & Technology Corp | High-speed optical delay generation method using rotating reflector in optical coherence tomography and its high-speed optical delay generation device |
| CN102520505A (en) * | 2011-12-04 | 2012-06-27 | 中国科学院光电技术研究所 | Prism-based double-pass optical delay line |
| CN211697497U (en) * | 2019-12-24 | 2020-10-16 | 上海雄博精密仪器股份有限公司 | Time-domain optical coherence tomography system |
| CN111184502A (en) * | 2020-01-08 | 2020-05-22 | 上海美沃精密仪器股份有限公司 | Method and apparatus for generating fast scanning optical phase delay line |
| CN111158139A (en) * | 2020-02-22 | 2020-05-15 | 中国工程物理研究院流体物理研究所 | Ultra-high-speed rotating prism optical fiber delay line for real-time terahertz medical imaging |
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Application publication date: 20220308 |