CN204153533U - High definition camera lens picture element detection photo engine - Google Patents
High definition camera lens picture element detection photo engine Download PDFInfo
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- CN204153533U CN204153533U CN201420640668.8U CN201420640668U CN204153533U CN 204153533 U CN204153533 U CN 204153533U CN 201420640668 U CN201420640668 U CN 201420640668U CN 204153533 U CN204153533 U CN 204153533U
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Abstract
The utility model relates to a kind of high definition camera lens picture element detection photo engine, comprise light source, reflection cavity and resolution chart, it is characterized in that: reflection cavity is ellipsoid structure, light inlet is located at ellipsoid first focus place, light-emitting window is located between ellipsoid second focus and central point, and described reflection cavity inner surface is coated with reflective membrane; Described light source is high brightness single die LED, is arranged on light inlet place, and described resolution chart is arranged on light-emitting window one end, is formed and closes reflection cavity structure.The utility model adopts high-power and high-luminance single die LED as lighting source, under guarantee illumination prerequisite, reduces power consumption, reduces aberration and caloric value, improve illumination efficiency; Especially ellipsoid reflection cavity is coordinated, form with the resolution chart at light-emitting window place and close reflection cavity, multipath reflection strengthens the illumination of resolution chart fringe region, obtain uniformity illuminating effect, can supporting up to 300 lines right/the high-resolution resolution version of millimeter, for inspection center resolution ratio higher than 200 lines right/the high definition camera lens of millimeter.
Description
Technical field:
The utility model belongs to optical field, particularly a kind of high definition camera lens picture element detection photo engine, especially adopts high brightness single die LED as light source.
Background technology:
At present, television cameras picture element projecting apparatus the highest detectable optical center resolution ratio be 200 lines right/millimeter, can not meet center resolution higher than 200 lines right/the inspection needs of the high definition camera lens of millimeter, generally adopt Halogen lamp LED or Multi-core planar package LED as lighting source, change light source luminescent intensity by regulating light source drive voltage and then change the illumination of projected image, although Halogen lamp LED and Multi-core planar package light source can reach higher illumination, but power consumption is large, illumination efficiency is low, light source life is also short, maintenance workload is large, and the light uniformity be irradiated on resolution chart is poor, affect Detection results.Focus adjusting mechanism generally adopts dovetail groove guide rail and micrometric screw mechanism, and the union piece between tested camera lens mounting interface and projecting light path's system is more, causes the positioning precision of camera lens lower.How to provide a kind of energy consumption low, and the photo engine that uniform illumination degree is good, namely become the object of the utility model research.
Summary of the invention:
The purpose of this utility model is the high definition camera lens picture element detection photo engine of a kind of high brightness low energy consumption of design and uniform illumination.
Technical solutions of the utility model are achieved in that a kind of high definition camera lens picture element detection photo engine, comprise light source, reflection cavity and resolution chart, it is characterized in that: reflection cavity is ellipsoid structure, light inlet is located at ellipsoid first focus place, light-emitting window is located between ellipsoid second focus and central point, and described reflection cavity inner surface is coated with reflective membrane; Described light source is high brightness single die LED, is arranged on light inlet place, and described resolution chart is arranged on light-emitting window one end, is formed and closes reflection cavity structure.
One transparency protected is also fixed with outside described resolution chart.
The ellipsoid semimajor axis length of described reflection cavity is 24.7mm, and semi-minor axis length is 11.31mm, and bifocal distance is 44.2mm; The exiting surface of described high brightness single die LED is at the outer 1.3mm place of described light inlet, and described light-emitting window is located at the second focus toward on the position of central point side 11.02mm.
Described reflective membrane the best is silver metal, and next is followed successively by aluminium, chromium, nickel.
The utility model adopts high-power and high-luminance single die LED as lighting source, under guarantee illumination prerequisite, reduces power consumption, reduces aberration and caloric value, improve illumination efficiency; Especially ellipsoid reflection cavity is coordinated, form with the resolution chart at light-emitting window place and close reflection cavity, multipath reflection strengthens the illumination of resolution chart fringe region, obtain uniformity illuminating effect, can supporting up to 300 lines right/the high-resolution resolution version of millimeter, for inspection center resolution ratio higher than 200 lines right/the high definition camera lens of millimeter.
Accompanying drawing illustrates:
Below in conjunction with concrete legend, the utility model is described further:
Fig. 1 light engine arrangement generalized section
Fig. 2 resolution chart schematic diagram
Fig. 3 resolution chart nodal line is to schematic diagram
Wherein
1-light source, 11-exiting surface, 2-reflection cavity, 21-light inlet
22-light-emitting window, 23-reflective membrane, 3-resolution chart, 31-figure
32-line is to 4-transparency protected F1-the first focal point F 2-the second focuses
O-central point a-semi-major axis b-semi-minor axis c-focal length
Detailed description of the invention:
With reference to Fig. 1, high definition camera lens picture element detection photo engine, comprises light source 1, reflection cavity 2 and resolution chart 3; Wherein reflection cavity 2 is ellipsoid structure, and light inlet 21 is located at ellipsoid first focal point F 1 place, and light-emitting window 22 is located between ellipsoid second focal point F 2 and central point O; Furthermore, the ellipsoid semi-major axis a length of this reflection cavity 2 is 24.7mm, and semi-minor axis length is 11.31mm, and bifocal distance is 44.2mm, be also two focus length c, and light-emitting window 22 is located at the second focal point F 2 toward on the position of central point O side 11.02mm; Reflection cavity 2 inner surface is coated with reflective membrane 23, and reflective membrane 23 optimal material is silver metal, and next is followed successively by aluminium, chromium, nickel.
Described light source 1 is high brightness single die LED, and keep the uniformity of bright dipping, be arranged on light inlet 21 place of reflection cavity 2, more precisely, the exiting surface 11 of high brightness single die LED is at the outer 1.3mm place of described light inlet 21.
Described resolution chart 3 is arranged on light-emitting window 22 one end, is formed and closes reflection cavity structure; Outside this resolution chart 3, be also fixed with one transparency protected 4, play dust-proof effect of Denging.
With reference to Fig. 2, for the line on figure 31 that resolution chart 3 is portrayed and each crossover node to 32, Fig. 3 be nodal line to 32 enlarged drawing.
Claims (4)
1. a high definition camera lens picture element detection photo engine, comprise light source, reflection cavity and resolution chart, it is characterized in that: reflection cavity is ellipsoid structure, light inlet is located at ellipsoid first focus place, light-emitting window is located between ellipsoid second focus and central point, and described reflection cavity inner surface is coated with reflective membrane; Described light source is high brightness single die LED, is arranged on light inlet place, and described resolution chart is arranged on light-emitting window one end, is formed and closes reflection cavity structure.
2. high definition camera lens picture element detection photo engine according to claim 1, is characterized in that: outside described resolution chart, be also fixed with one transparency protected.
3. high definition camera lens picture element detection photo engine according to claim 1, is characterized in that: the ellipsoid semimajor axis length of reflection cavity is 24.7mm, and semi-minor axis length is 11.31mm, and bifocal distance is 44.2mm; The exiting surface of described high brightness single die LED is at the outer 1.3mm place of described light inlet, and described light-emitting window is located at the second focus toward on the position of central point side 11.02mm.
4. high definition camera lens picture element detection photo engine according to claim 1, is characterized in that: reflective membrane is silver metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420640668.8U CN204153533U (en) | 2014-10-30 | 2014-10-30 | High definition camera lens picture element detection photo engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420640668.8U CN204153533U (en) | 2014-10-30 | 2014-10-30 | High definition camera lens picture element detection photo engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204153533U true CN204153533U (en) | 2015-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420640668.8U Active CN204153533U (en) | 2014-10-30 | 2014-10-30 | High definition camera lens picture element detection photo engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204153533U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018160438A (en) * | 2017-03-24 | 2018-10-11 | ウシオライティング株式会社 | Luminaire |
-
2014
- 2014-10-30 CN CN201420640668.8U patent/CN204153533U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018160438A (en) * | 2017-03-24 | 2018-10-11 | ウシオライティング株式会社 | Luminaire |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |