CN108420399A - A kind of Placido disks lighting system and processing method - Google Patents
A kind of Placido disks lighting system and processing method Download PDFInfo
- Publication number
- CN108420399A CN108420399A CN201810313533.3A CN201810313533A CN108420399A CN 108420399 A CN108420399 A CN 108420399A CN 201810313533 A CN201810313533 A CN 201810313533A CN 108420399 A CN108420399 A CN 108420399A
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- China
- Prior art keywords
- placido
- supporting rack
- disks
- led lamp
- bowl
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Classifications
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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
- A61B3/107—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining the shape or measuring the curvature of the cornea
-
- 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
- A61B3/0008—Apparatus for testing the eyes; Instruments for examining the eyes provided with illuminating means
Abstract
The present invention relates to a kind of Placido disks lighting system and processing methods, Placido disk lighting systems include bowl-shape supporting rack, LED lamp panel is installed at the bottom of bowl center of supporting rack, it is fixed with bowl-shape Placido disks at the rim of a bowl edge of supporting rack, the white LED lamp for meeting illumination optical simulation requirements of branch formula distribution is installed in LED lamp panel, 11 chequered with black and white black annulus and 11 white annulus are formed in Placido disk cambered surfaces；The processing method of Placido disks includes that (1) injection molding obtains blank disc；(2) blank disc lathe modifies to obtain conditioner discs；(3) it is corresponded in conditioner discs inner surface and processes the grooves of 1mm depths on dark circles ring position；(4) black epoxy is poured into conditioner discs；(5) finishing conditioner discs obtain Placido disk finished products again.LED quantity used in the present invention is few, low in energy consumption, can be obtained uniform projection pattern without backlight and uniform light board, while solving Placido dish structure complexity, the big problem of difficulty of processing.
Description
Technical field
The invention belongs to ophthalmic medical equipment technical field, a kind of Placido disks lighting system and processing side are referred to
Method.
Background technology
Corneal topographers are one of most common instrument of clinical ophthalmology, wherein Placido (Pu Laxiduoshi) lighting system
It is its core component.Light and dark annulus pattern can be projected eye cornea surface by it.Common Placido illuminations system
System has two kinds of Placido cones and Placido disks.Wherein, the measurement data points that Placido cones can provide will be more than Placido
Disk, but it is close apart from human eye when in use, and for eye socket, deeper people is difficult with, and is gradually replaced by Placido disks.It is right
For Placido lighting systems, the uniformity of machining accuracy, repeatability and lighting pattern all directly affects corneal topography
The measurement accuracy of instrument.The multiple machine-shaping of single-point tool is mostly used in technique at present or multi-disc is black, white plastic disk is alternate
It is superimposed hot-forming.Both methods complex process, pollution are big, it is difficult to ensure machining accuracy and repeatability.
Patent WO2014/083498A devises a kind of Placido disk lighting systems of LED light source, the shape on eye cornea
At uniform light and dark annulus pattern.But its LED light source quantity used is more than 360, and power is high, and calorific value is big,
The backlight of cooperation white is also needed to, it is complicated.In addition, the processing method for being also not described in Placido disks in patent.
Patent CN100500345C realizes a kind of one-time formed processing method of Placido cones.But this method needs to customize a kind of spy
Different Multi-blade cutter, and it is only used for the processing of Placido cones, it is difficult to it is realized in the processing of Placido disks.
Invention content
The purpose of the invention is to overcome the deficiencies of the prior art and provide a kind of Placido disks lighting system and processing
Method.
The present invention solves its technical problem and following technical scheme is taken to realize：
A kind of Placido disks lighting system, including bowl-shape supporting rack are equipped with LED light at the bottom of bowl center of supporting rack
Plate is fixed with bowl-shape Placido disks at the rim of a bowl edge of supporting rack, between Placido disks cambered surface and LED lamp panel cambered surface equidistantly
It is fixed,
Wherein, the bowl-shape supporting rack includes the imaging system lens barrel mounting hole in the middle part of bottom of bowl platform, in lens barrel mounting hole
External concentric be angularly distributed and be provided with multiple LED lamp panel mounting holes, in the lower section of supporting rack, fixation system is provided with along bowl-shape side wall
Lens barrel of uniting installs hole slot, and cable-through hole slot is had in the top of supporting rack and both sides, even away from interval in the periphery of cable-through hole slot
Multiple heat emission holes are provided with, are provided with multiple Placido disks mounting holes away from interval the external margin of supporting rack is even；
Wherein, the LED lamp panel is the radial aluminum-base printing circuit board in the center of circle, and LED lamp panel includes the circle at center
Substrate is provided with the central through hole for being inserted into imaging system lens barrel, the circular substrate in central through hole periphery in the middle part of circular substrate
On be provided with multiple LED lamp panel mounting holes, LED lamp panel mounting hole is corresponding with the LED lamp panel mounting hole on supporting rack, passes through fixed spiral shell
The circular substrate of LED lamp panel is fixed on supporting rack by bolt, and on the periphery of circular substrate, equal subangle, which is integrally formed with, extends outwardly
A plurality of branch, it is affixed on the inside of the external end of each branch and support frame as described above edge, on the inside of the root of branch, centre,
Intermediate outside and branch end are equipped with the white light LEDs of four circle patch type by annular distribution respectively, and all white light LEDs meet optics
Lighting simulation requirement；
Wherein, it is provided with the mesoporous of trying to get to the heart of a matter installed for imaging system lens barrel in the middle part of the Placido disks, in Placido disks
One middle side part is provided with the human eye LED vias for installing human eye surface's infrared illumination, is provided at the edge of Placido disks multiple
Disk hole corresponding with Placido disks mounting hole position on supporting rack, Placido disks mesoporous of trying to get to the heart of a matter to being made with one heart between edge
Have 11 black annulus, form 11 of interval white annulus between 11 black annulus, each black annulus and
The position of white annulus is obtained by optical modeling emulation, ensures that the annulus pattern that it is incident upon on cornea is wide.
Moreover, a plurality of branch is 20 branches, and the root of the branch, intermediate inside, intermediolateral white light
LED is interval branch installation, and the white light LEDs of the branch end are to install one by one, amount to 50 chip type white light LED and meet light
Learn lighting simulation requirement.
Moreover, the colour temperature of the white light LEDs is not less than 4000K, in order to ensure the uniform of Placido disk annulus patterns
Property, the angle of divergence is not less than 130 °.
The processing method of Placido disks in a kind of Placido disks lighting system as described above, including steps are as follows：
(1) mold injection will be carried out containing the transparent resin of 10%~20% fluorescent powder by Shooting Technique first, obtained
The blank disc of Placido disks；
(2) and then blank disc is stuck on lathe and is obtained according to design size finishing blank disc surfaces externally and internally with cutter
The conditioner discs of Placido disks；
(3) position where corresponding to all black annulus on conditioner discs inner surface using cutter processes the recessed of 1mm depths
Slot；
(4) under the state that vacuumizes, black epoxy is poured into conditioner discs until concordant with Pan Kou；
(5) conditioner discs inner surface is modified again using cutter after black epoxy solidification, complete the production to obtain
Placido disk finished products.
The advantages and positive effects of the present invention are：
1, present invention design realizes a kind of Placido disks lighting system, can be used as the core projection of corneal topographers
Component.LED quantity used in system is few, low in energy consumption, can be obtained uniform projection pattern without backlight and uniform light board.
2, The invention also achieves a kind of processing methods of Placido disks.This method easy realization simple for process, the feature of environmental protection
By force, high precision machining, repeatability are high.
Description of the drawings
Fig. 1 is Placido disks lighting system side sectional view of the present invention；
Fig. 2 is the front plan view of supporting rack described in Fig. 1；
Fig. 3 is the front plan view of LED lamp panel described in Fig. 1；
Fig. 4 is Placido disks sectional axonometric drawing of the present invention；
Fig. 5 is Placido disks processing process figure of the present invention.
Specific implementation mode
Present invention implementation is further described below in conjunction with attached drawing, following embodiment is descriptive, is not to limit
Property, protection scope of the present invention cannot be limited with this.
A kind of Placido disks lighting system, as shown in Figure 1, including the supporting rack 3 of bowl structure, in the bottom of bowl of supporting rack
The bottom of bowl madial wall for being close to supporting rack at center is equipped with LED lamp panel 2, is fixed with and supporting rack bowl at the rim of a bowl edge of supporting rack
The corresponding bowl-shape Placido disks 1 of shape cambered surface, are equidistantly fixed between Placido disks cambered surface and LED lamp panel cambered surface,
Wherein, as shown in the figures 1 and 2, the supporting rack of the bowl structure includes the imaging system lens barrel in the middle part of bottom of bowl platform
Mounting hole 4 is provided with multiple LED lamp panel mounting holes 5, in supporting rack in the external concentric circle spaced at equal angles around of lens barrel mounting hole
Lower section is provided with fixation system lens barrel along bowl-shape side wall and installs hole slot 9, cable-through hole slot is had in the top of supporting rack and both sides
6, be provided with multiple heat emission holes 8 away from interval the periphery of cable-through hole slot is even, the external margin of supporting rack it is even be provided with away from interval it is multiple
Placido disks mounting hole 7；
Wherein, as shown in Fig. 1 or 3, the LED lamp panel is the radial aluminum-base printing circuit board in the center of circle, including at center
Circular substrate, be provided in the middle part of circular substrate be inserted into imaging system lens barrel central through hole 12, central through hole periphery
Multiple LED lamp panel mounting holes 13 are provided on circular substrate, LED lamp panel mounting hole is corresponding with the LED lamp panel mounting hole on supporting rack,
LED lamp panel is fixed on supporting rack by LED lamp panel fixing bolt, on the periphery of circular substrate, equal subangle is integrally outside
Extending a plurality of branch 10, the external end of branch and support frame as described above are affixed, on the inside of the root of branch, centre, intermediate outside
And branch end is equipped with four circle chip type white light LED11 by annular distribution respectively, all white light LEDs meet illumination optical emulation
It is required that；
In the specific implementation of the present invention, a plurality of branch is 20 branches, in the root of the branch, centre
Side, intermediolateral white light LEDs are interval branch installation, and the white light LEDs of the branch end are to install one by one, amount to 50 patches
Chip white light LEDs meet illumination optical simulation requirements.
In the specific implementation of the present invention, white ring color is partially yellow in order to prevent, and the colour temperature of the chip type white light LED is not
Less than 4000K, in order to ensure that the uniformity of Placido disk annulus patterns, the angle of divergence are not less than 130 °.
Wherein, it as shown in Fig. 1 or 4, is provided in the middle part of the Placido disks and tries to get to the heart of a matter for what imaging system lens barrel was installed
Hole 18 is provided with the human eye LED vias 16 for installing human eye surface's infrared illumination in one middle side part of Placido disks,
The edge of Placido disks is provided with multiple disk hole 17 corresponding with Placido disks mounting hole position on supporting rack, in Placido disks
Mesoporous of trying to get to the heart of a matter to 11 whites for forming interval between 11 black annulus, 14,11 black annulus are formed between edge with one heart
The position of annulus 15, each black annulus and white annulus is obtained by optical modeling emulation, ensures that it is incident upon on cornea
Annulus pattern it is wide.
The processing method of Placido disks in a kind of Placido disks lighting system, as shown in figure 5, including steps are as follows：
(1) mold injection will be carried out containing the transparent resin of 10%~20% fluorescent powder by Shooting Technique first, obtained
Obtain the blank disc of Placido disks；
(2) and then blank disc is stuck on lathe and is obtained according to design size finishing blank disc surfaces externally and internally with cutter
The conditioner discs of Placido disks；
(3) position where corresponding to all black annulus on conditioner discs inner surface using cutter processes the recessed of 1mm depths
Slot；
(4) under the state that vacuumizes, black epoxy (can mix ink powder when necessary) is poured into conditioner discs until with
Pan Kou is concordant, prevents bubble from generating；
(5) conditioner discs inner surface is modified again using cutter after black epoxy solidification to complete the production, obtain
Placido disk finished products.
Claims (4)
1. a kind of Placido disks lighting system, it is characterised in that：Including bowl-shape supporting rack, pacify at the bottom of bowl center of supporting rack
Equipped with LED lamp panel, bowl-shape Placido disks, Placido disks cambered surface and LED lamp panel cambered surface are fixed at the rim of a bowl edge of supporting rack
Between equidistantly fix,
Wherein, the bowl-shape supporting rack includes the imaging system lens barrel mounting hole in the middle part of bottom of bowl platform, in the outer of lens barrel mounting hole
Angularly distribution is provided with multiple LED lamp panel mounting holes with one heart in portion, and in the lower section of supporting rack, fixation system mirror is provided with along bowl-shape side wall
Cylinder installation hole slot, cable-through hole slot is had in the top of supporting rack and both sides, even is provided with away from interval in the periphery of cable-through hole slot
Multiple heat emission holes are provided with multiple Placido disks mounting holes the external margin of supporting rack is even away from interval；
Wherein, the LED lamp panel is the radial aluminum-base printing circuit board in the center of circle, and LED lamp panel includes the circular substrate at center,
It is provided with the central through hole for being inserted into imaging system lens barrel in the middle part of circular substrate, is provided on the circular substrate of central through hole periphery
Multiple LED lamp panel mounting holes, LED lamp panel mounting hole is corresponding with the LED lamp panel mounting hole on supporting rack, will by fixing bolt
The circular substrate of LED lamp panel is fixed on supporting rack, and on the periphery of circular substrate, equal subangle is integrally formed with outwardly extending more
Branch, it is affixed on the inside of the external end and support frame as described above edge of each branch, it is intermediate on the inside of the root of branch, centre
Outside and branch end are equipped with the white light LEDs of four circle patch type by annular distribution respectively, and all white light LEDs meet illumination optical
Simulation requirements；
Wherein, it is provided with the mesoporous of trying to get to the heart of a matter installed for imaging system lens barrel in the middle part of the Placido disks, in Placido disks side
Middle part is provided with the human eye LED vias for installing human eye surface's infrared illumination, and multiple and branch is provided at the edge of Placido disks
The corresponding disk hole in Placido disks mounting hole position on support, Placido disks mesoporous of trying to get to the heart of a matter to ten are formed between edge with one heart
One black annulus forms 11 white annulus at interval, each black annulus and white between 11 black annulus
The position of annulus is obtained by optical modeling emulation, ensures that the annulus pattern that it is incident upon on cornea is wide.
2. Placido disks lighting system according to claim 1, it is characterised in that：The a plurality of branch is 20 branches
Wooden fork, the root of the branch, intermediate inside, intermediolateral white light LEDs are interval branch installation, the white light of the branch end
LED is to install one by one, amounts to 50 chip type white light LED and meets illumination optical simulation requirements.
3. Placido disks lighting system according to claim 1, it is characterised in that：The colour temperature of the white light LEDs is not low
In 4000K, in order to ensure that the uniformity of Placido disk annulus patterns, the angle of divergence are not less than 130 °.
4. the processing method of Placido disks in a kind of Placido disks lighting system as described in claim 1, it is characterised in that
Including steps are as follows：
(1) mold injection will be carried out containing the transparent resin of 10%-20% fluorescent powders by Shooting Technique first, obtained
The blank disc of Placido disks；
(2) and then blank disc is stuck on lathe and obtains Placido according to design size finishing blank disc surfaces externally and internally with cutter
The conditioner discs of disk；
(3) position where corresponding to all black annulus on conditioner discs inner surface using cutter processes the groove of 1mm depths；
(4) under the state that vacuumizes, black epoxy is poured into conditioner discs until concordant with Pan Kou；
(5) conditioner discs inner surface is modified again using cutter after black epoxy solidification, complete the production to obtain Placido disks
Finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810313533.3A CN108420399A (en) | 2018-04-10 | 2018-04-10 | A kind of Placido disks lighting system and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810313533.3A CN108420399A (en) | 2018-04-10 | 2018-04-10 | A kind of Placido disks lighting system and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108420399A true CN108420399A (en) | 2018-08-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810313533.3A Pending CN108420399A (en) | 2018-04-10 | 2018-04-10 | A kind of Placido disks lighting system and processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110367926A (en) * | 2019-07-22 | 2019-10-25 | 天津市索维电子技术有限公司 | A kind of xerophthalmia check device and method applied to self-medicine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000279383A (en) * | 1999-03-30 | 2000-10-10 | Nidek Co Ltd | Cornea shape examination instrument |
| CN103799976A (en) * | 2014-03-04 | 2014-05-21 | 厦门大学 | Comprehensive diagnostic apparatus for xerophthalmia |
| WO2014083498A1 (en) * | 2012-11-28 | 2014-06-05 | Costruzioni Strumenti Oftalmici C.S.O. S.R.L. | A led light placido disc projector for a corneal topography system |
| CN207136833U (en) * | 2017-01-19 | 2018-03-27 | 上海第二工业大学 | A kind of hand-held Placido corneas shine shadow instrument |
| CN208677362U (en) * | 2018-04-10 | 2019-04-02 | 天津市索维电子技术有限公司 | A kind of Placido disk lighting system |
-
2018
- 2018-04-10 CN CN201810313533.3A patent/CN108420399A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000279383A (en) * | 1999-03-30 | 2000-10-10 | Nidek Co Ltd | Cornea shape examination instrument |
| WO2014083498A1 (en) * | 2012-11-28 | 2014-06-05 | Costruzioni Strumenti Oftalmici C.S.O. S.R.L. | A led light placido disc projector for a corneal topography system |
| CN103799976A (en) * | 2014-03-04 | 2014-05-21 | 厦门大学 | Comprehensive diagnostic apparatus for xerophthalmia |
| CN207136833U (en) * | 2017-01-19 | 2018-03-27 | 上海第二工业大学 | A kind of hand-held Placido corneas shine shadow instrument |
| CN208677362U (en) * | 2018-04-10 | 2019-04-02 | 天津市索维电子技术有限公司 | A kind of Placido disk lighting system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110367926A (en) * | 2019-07-22 | 2019-10-25 | 天津市索维电子技术有限公司 | A kind of xerophthalmia check device and method applied to self-medicine |
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| CB03 | Change of inventor or designer information |
Inventor after: Chen Jili Inventor after: Qi Yue Inventor after: Wang Xueqiao Inventor after: Wang Xi Inventor after: Li Ning Inventor before: Qi Yue Inventor before: Wang Xueqiao Inventor before: Wang Xi Inventor before: Li Ning |
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