CN212255852U - Full high-definition projection objective lens - Google Patents
Full high-definition projection objective lens Download PDFInfo
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- CN212255852U CN212255852U CN202021976932.7U CN202021976932U CN212255852U CN 212255852 U CN212255852 U CN 212255852U CN 202021976932 U CN202021976932 U CN 202021976932U CN 212255852 U CN212255852 U CN 212255852U
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Abstract
The utility model discloses a full-high-definition projection objective, which comprises a first lens, a second lens, a third lens and a fourth lens which are arranged in sequence according to the advancing direction of light; the first lens is a plano-convex lens, the second lens is a concave-convex lens, the third lens is a biconcave lens, and the fourth lens is a plano-convex lens; the plane of the first lens is a light incidence plane, the convex surface of the second lens is a light incidence plane, the surface of the third lens, which has a smaller absolute value of the spherical radius, is a light incidence plane, and the plane of the fourth lens is a light incidence plane; the first lens, the second lens, the third lens and the fourth lens are coaxially aligned. The utility model has high resolution, high light utilization ratio, small distortion, good transfer function index, excellent image quality and high uniformity, and is suitable for 4.8-5.6 inches of light valve projection display; and the aperture value is smaller, so that the LED lamp is suitable for a larger light source light-emitting area, is favorable for outputting higher brightness, and has better cost performance and applicability.
Description
Technical Field
The utility model relates to a projector technical field, in particular to full high-definition projection objective.
Background
With the further reduction of the size of the LCD light valve of a single LCD projector, the FHD light valve of 5-5.5inch is very common at present, the pixel particles have been reduced to about 50 microns, and when the conventional classical 3-piece kock objective lens is applied to a larger aperture such as Fno not more than 3.5, the limit of MTF (transfer function), the limit of lattice resolution, and the index limit of each field of view have made it difficult to achieve the basic requirement of developing the focusing performance of a full-height clear light valve, so 4 or more pieces of glass are needed to realize better indexes.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough with regard to overcoming prior art, provide a full high definition resolution, light utilization rate is higher, the less full high definition projection objective of distortion, it can be applicable to great light source luminous area, can obtain far away than 3 pieces formula kock objective more excellent distortion index and transfer function under the prerequisite of better price/performance ratio, and can improve luminous flux output to a great extent, improve the luminance and the image quality of throwing the image, improve the peripheral luminous flux of image.
In order to achieve the above object, the present invention provides a full-high-definition projection objective, which comprises a first lens, a second lens, a third lens and a fourth lens, which are sequentially arranged along the light traveling direction; the first lens is a plano-convex lens, the second lens is a concave-convex lens, the third lens is a biconcave lens, and the fourth lens is a plano-convex lens; the plane of the first lens is an incident plane, the convex surface of the second lens is a light incident plane, the surface of the third lens, which has a smaller absolute value of spherical radius, is a light incident plane, and the plane of the fourth lens is a light incident plane; the first lens, the second lens, the third lens and the fourth lens are coaxially aligned.
Further, adjacent vertex spacing L of the first lens and the second lens10.5 + -0.2 mm, 5.62 + -0.15 mm of adjacent vertex spacing L2 of the second lens from the third lens, and 16.19 + -0.2 mm of adjacent vertex spacing L3 of the third lens from the fourth lens.
Further, the convex surface of the first lens has a spherical radius of 137.4mm, a center thickness of 8.5 +/-0.15 mm and is made of H-ZK11 or the international trade mark thereof.
Further, the spherical radius of the concave surface of the second lens is 107.15mm, the spherical radius of the convex surface of the second lens is 58mm, the center thickness of the second lens is 14.97 +/-0.15 mm, and the second lens is made of H-ZK11 or the international trade mark thereof.
Furthermore, the spherical radii of the two concave surfaces of the third lens are respectively 90.16mm and 87.1mm, the center thickness is 5.1 +/-0.15 mm, and the material is H-ZF2 or the international trade mark thereof.
Furthermore, the spherical radius of the convex surface of the fourth lens is 68.082mm, the center thickness is 15 +/-0.15 mm, and the material is H-ZK11 or the international substitution mark thereof.
Optionally, the light transmission aperture of the first lens is greater than or equal to Φ 62.8mm, the light transmission aperture of the second lens is greater than or equal to Φ 51.4mm, the light transmission aperture of the third lens is greater than or equal to Φ 38.5mm, and the light transmission aperture of the fourth lens is greater than or equal to Φ 64 mm.
Optionally, the first lens, the second lens, the third lens and the fourth lens are coated with antireflection films on both sides, the finish grade is not lower than 80/50, the f-number of the lens is not more than 7, the local f-number is not more than 2, and the eccentricity is not more than 3 minutes.
The utility model has the advantages that: the utility model discloses a mode of four pieces of lens combinations, the resolution ratio is high, and light utilization ratio is higher, and the distortion is little, and peripheral luminous flux is high, can be applicable to great light source luminous area, and can improve projector luminous flux output by great limit, has improved the luminance and the image quality of projection image greatly, is particularly useful for current low-priced LED light source, is particularly useful for 4.8-5.6 inches's light valve projection video picture, has the low price, easy preparation, optical imaging index characteristic such as higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
The above reference numerals:
1 first lens, 2 second lens, 3 third lens, 4 fourth lens.
Detailed Description
The following further describes the present invention with reference to the attached drawings, but the scope of the present invention is not limited thereto.
As shown in fig. 1, the full-high-definition projection objective lens provided in this embodiment includes a first lens 1, a second lens 2, a third lens 3, and a fourth lens 4, which are sequentially arranged in a light traveling direction; the first lens 1 is a plano-convex lens, the second lens 2 is a concave-convex lens, the third lens 3 is a biconcave lens, and the fourth lens 4 is a plano-convex lens; the plane of the first lens 1 is an incident plane, the convex surface of the second lens 2 is a light incident plane, the surface of the third lens 3 with the relatively smaller absolute value of the spherical radius is a light incident plane, and the plane of the fourth lens 4 is a light incident plane; the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 are coaxially aligned.
In this embodiment, the distance L between adjacent vertexes of the first lens 1 and the second lens 210.5 + -0.2 mm, 5.62 + -0.15 mm of adjacent vertex spacing L2 of the second lens 2 and the third lens 3, and 16.19 + -0.2 mm of adjacent vertex spacing L3 of the third lens 3 and the fourth lens 4.
In this embodiment, the convex surface of the first lens 1 has a spherical radius of 137.4mm, a center thickness of 8.5 ± 0.15mm, and is made of H-ZK11 or its international trade mark.
In this embodiment, the spherical radius of the concave surface of the second lens 2 is 107.15mm, the spherical radius of the convex surface is 58mm, the center thickness is 14.97 ± 0.15mm, and the material is H-ZK11 or its international trade mark.
In this embodiment, the spherical radii of the two concave surfaces of the third lens 3 are 90.16mm and 87.1mm, respectively, the center thickness is 5.1 ± 0.15mm, and the material is H-ZF2 or its international trade mark.
In this embodiment, the convex surface of the fourth lens 4 has a spherical radius of 68.082mm, a center thickness of 15 ± 0.15mm, and is made of H-ZK11 or its international trade mark.
In the embodiment, the light transmission aperture of the first lens 1 is more than or equal to phi 62.8 mm; the light transmission aperture of the second lens 2 is more than or equal to phi 51.4 mm; the light transmission aperture of the third lens 3 is more than or equal to phi 38.5 mm; the light transmission aperture of the fourth lens 4 is larger than or equal to phi 64 mm.
In this embodiment, the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 are coated with antireflection films on both sides, the finish grade is 60/40, the f-number of the lens is less than or equal to 5, the local f-number is less than or equal to 1, and the eccentricity is less than or equal to 2 minutes.
The embodiment adopts a mode of combining four lenses, so that the resolution is high, the light utilization rate is high, the distortion is small, and the peripheral light flux is high; the aperture value is small, the luminous flux output of the projector can be improved to a large extent, the brightness and the image quality of a projected image are greatly improved, the LED light source is particularly suitable for the existing cheap LED light source, is particularly suitable for 4.8-5.6 inches of light valve projection display, and has the characteristics of low price, easiness in manufacturing, high optical imaging index and the like.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A full high-definition projection objective is characterized by comprising a first lens (1), a second lens (2), a third lens (3) and a fourth lens (4) which are sequentially arranged according to the light advancing direction; the first lens (1) is a plano-convex lens, the second lens (2) is a concave-convex lens, the third lens (3) is a biconcave lens, and the fourth lens (4) is a plano-convex lens; the plane of the first lens (1) is a light incidence plane, the convex surface of the second lens (2) is a light incidence plane, the surface of the third lens (3) with the relatively smaller absolute value of the spherical surface radius is a light incidence plane, and the plane of the fourth lens (4) is a light incidence plane; the first lens (1), the second lens (2), the third lens (3) and the fourth lens (4) are coaxially arranged.
2. Full high-definition projection objective according to claim 1, characterized in that the adjacent vertex distances L of the first (1) and second (2) optics are10.5 + -0.2 mm, 5.62 + -0.15 mm of adjacent vertex spacing L2 of the second lens (2) and the third lens (3), 16.19 + -0.2 mm of adjacent vertex spacing L3 of the third lens (3) and the fourth lens (4).
3. A full high-definition projection objective as claimed in claim 1, characterized in that the convex surface of the first lens (1) has a spherical radius of 137.4mm, a center thickness of 8.5 ± 0.15mm and is made of H-ZK11 or its international trade mark.
4. A full high-definition projection objective as claimed in claim 1, characterized in that the concave surface of the second lens (2) has a spherical radius of 107.15mm, the convex surface has a spherical radius of 58mm, the center thickness is 14.97 ± 0.15mm, and the material is H-ZK11 or its international trade mark.
5. A full high-definition projection objective as claimed in claim 1, characterized in that the spherical radii of the two concave surfaces of the third lens element (3) are 90.16mm and 87.1mm, respectively, the center thickness is 5.1 ± 0.15mm, and the material is H-ZF2 or its international trade mark.
6. Full high-definition projection objective according to claim 1, characterized in that the convex surface of the fourth lens (4) has a spherical radius of 68.082mm, a center thickness of 15 ± 0.15mm, and a material of H-ZK11 or its international trade mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021976932.7U CN212255852U (en) | 2020-09-10 | 2020-09-10 | Full high-definition projection objective lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021976932.7U CN212255852U (en) | 2020-09-10 | 2020-09-10 | Full high-definition projection objective lens |
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| Publication Number | Publication Date |
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| CN212255852U true CN212255852U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021976932.7U Active CN212255852U (en) | 2020-09-10 | 2020-09-10 | Full high-definition projection objective lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022151838A1 (en) * | 2021-01-18 | 2022-07-21 | 广东烨嘉光电科技股份有限公司 | Large-aperture four-piece optical camera lens |
| DE102022110529A1 (en) | 2022-04-29 | 2023-11-02 | Marelli Automotive Lighting Reutlingen (Germany) GmbH | Projection module for a motor vehicle headlight |
-
2020
- 2020-09-10 CN CN202021976932.7U patent/CN212255852U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022151838A1 (en) * | 2021-01-18 | 2022-07-21 | 广东烨嘉光电科技股份有限公司 | Large-aperture four-piece optical camera lens |
| DE102022110529A1 (en) | 2022-04-29 | 2023-11-02 | Marelli Automotive Lighting Reutlingen (Germany) GmbH | Projection module for a motor vehicle headlight |
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