CN218767543U - Lens of single-chip LCD projector - Google Patents
Lens of single-chip LCD projector Download PDFInfo
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- CN218767543U CN218767543U CN202222806220.6U CN202222806220U CN218767543U CN 218767543 U CN218767543 U CN 218767543U CN 202222806220 U CN202222806220 U CN 202222806220U CN 218767543 U CN218767543 U CN 218767543U
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Abstract
The utility model relates to the technical field of projectors, in particular to a single-chip LCD projector lens, which is characterized in that a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a Fresnel lens are arranged in sequence from emergent light to incident light; the first lens is a concave-convex lens, the second lens is a biconvex lens, the third lens is a biconcave lens, the fourth lens is a concave-convex lens, and the fifth lens is a biconvex lens. The lens adopts a mode of combining five lenses, has higher light utilization rate, can improve the luminous flux output of a projector to a greater extent and keep the image definition of the corners of the picture. The lens is a short-focus projection lens, the projection ratio is 0.9-1.0, and a large picture of 100 inches can be projected when the distance between the surface of the lens at the front edge of the machine and the screen is 2 m.
Description
Technical Field
The utility model relates to a projector technical field, in particular to monolithic LCD projector camera lens.
Background
The single-chip LCD projector is a projector product which uses a full-color and transmission-type LCD screen as a screen, light is emitted from an illumination component, and an image of the screen is magnified and projected on the screen through a projection lens. The lens transmittance of the existing single-chip LCD projector is generally 1.3-1.6, taking the transmittance of 1.4 as an example, if a large picture of 100 inches is projected, the large picture can be projected only by the distance of 3.1m from the surface of the lens at the front edge of the projector to a screen, and the requirement on the space size is high when the projector is used.
SUMMERY OF THE UTILITY MODEL
For overcoming the deficiencies in the prior art, the utility model provides a single-chip LCD projector lens of short burnt, high definition.
In order to achieve the above object, the utility model adopts the following technical scheme: a single-chip LCD projector lens, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a Fresnel lens are sequentially arranged from emergent light to incident light;
the lens aperture is positioned between the second lens and the third lens;
the first lens is a concave-convex lens, and the arc-shaped convex part of the first lens faces the emergent direction;
the second lens is a biconvex lens;
the third lens is a biconcave lens;
the fourth lens is a concave-convex lens, and the arc-shaped convex part of the fourth lens faces the incident direction;
the fifth lens is a biconvex lens;
the first lens, the second lens, the third lens and the fourth lens are coaxially arranged.
Further, the air distance L1 between the first lens and the second lens is 12.02 ± 0.05mm, the air distance L2 between the second lens and the third lens is 24.22 ± 0.05mm, the air distance L3 between the third lens and the fourth lens is 2 ± 0.05mm, and the air distance L4 between the fourth lens and the fifth lens is 0.4 ± 0.05mm.
Further, the spherical radius of the first lens towards the one side of emergent light direction is 182.6mm, the spherical radius of the first lens towards the one side of incident light direction is 58mm, and the center thickness is 4.5 +/-0.05 mm.
Further, the spherical radius of the one side of second lens towards emergent light direction is 67.7mm, the spherical radius of the one side of second lens towards incident light direction is 393.4mm, the center thickness of second lens is 10.5 ± 0.05mm.
Further, the spherical radius of the third lens towards the one side of emergent light direction is 48.5mm, the spherical radius of the third lens towards the one side of incident light is 392.3mm, the center thickness of the third lens is 6.43 +/-0.05 mm.
Further, the spherical radius of the one side of fourth lens towards emergent light direction is 289mm, the spherical radius of the one side of fourth lens towards incident light is 52.3mm, the center thickness of fourth lens is 10.5 ± 0.05mm.
Furthermore, the spherical radius of one surface of the fifth lens facing the emergent light direction is 954.7mm, the spherical radius of one surface of the fifth lens facing the incident light direction is 82.2mm, and the center thickness of the fifth lens is 12.3 +/-0.05 mm.
Furthermore, the outer diameter range of the first lens is 68-72 mm, the outer diameter range of the second lens is 53-57 mm, the outer diameter range of the third lens is 51-55 mm, the outer diameter range of the fourth lens is 55-59 mm, and the outer diameter range of the fifth lens is 69-74 mm.
Furthermore, the first lens, the second lens, the third lens, the fourth lens and the fifth lens are provided with antireflection coatings on two sides, the finish grade is higher than or equal to 80/50, the f-number of the lens is less than or equal to 6, the local f-number is less than or equal to 1, and the eccentricity is less than or equal to 2 minutes.
Further, the material of the first lens is HZK9B, the material of the second lens is HF4, the material of the third lens is HZF4, the material of the fourth lens is HZK9B, and the material of the fifth lens is HZK9B.
It can be known from the above description that the utility model discloses, compare with prior art, the utility model provides a single chip LCD projector camera lens has following advantage:
the lens adopts a mode of combining five lenses, the f-number Fno of the lens is 2.5, the lens can be matched with an LCD light valve of 3.5-5.5 inch, the high resolution of 1080P can be achieved, the light utilization rate is high, the luminous flux output of a projector can be greatly improved, and the imaging definition of picture corners is kept.
The lens is a short-focus projection lens, the projection ratio is 0.9-1.0, and a large picture of 100 inches can be projected when the distance between the surface of the lens at the front edge of the machine and the screen is 2 m.
Under the condition that the transmission efficiency of the LCD light valve is 5.8-6.2%, the projector can output light flux of 330-500 lumens at the highest, and the brightness and the image quality of a projected image are greatly improved. The MTF of 70-90 inch full field can reach more than 50%, and through focus of each field uniformly and synchronously changes, the projection image quality is good, the optical distortion is less than 0.35%, and the light source is suitable for the existing cheap LED light source, so the light source has the characteristics of low price, easy manufacture, high optical imaging index and the like.
Drawings
Fig. 1 is a schematic view of a lens structure of a single-chip LCD projector according to the present invention.
The labels in the figure correspond to the following: 1-first lens, 2-second lens, 3-third lens, 4-fourth lens, 5-fifth lens, 6-Fresnel lens and 7-lens diaphragm.
Detailed Description
The present invention will be further described with reference to the following detailed description.
Referring to fig. 1, a single-chip LCD projector lens includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, and a fresnel lens 6 sequentially arranged from an emergent light to an incident light direction. The first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 are coaxially arranged.
The lens diaphragm 7 is positioned between the second lens 2 and the third lens 3; the air space L1 between the first lens 1 and the second lens 2 is 12.02 +/-0.05 mm, the air space L2 between the second lens 2 and the third lens 3 is 24.22 +/-0.05 mm, the air space L3 between the third lens 3 and the fourth lens 4 is 2 +/-0.05 mm, and the air space L4 between the fourth lens 4 and the fifth lens 5 is 0.4 +/-0.05 mm.
First lens 1 is meniscus lens, and 1 arc bulge of first lens is towards the exit direction, the spherical radius of 1 one side of first lens towards the exit direction is 182.6mm, the spherical radius of 1 one side of first lens towards the incident light direction is 58mm, the center thickness of 1 first lens is 4.5 0.05mm, the material of 1 first lens is HZK9B or its international substitution trade mark.
Second lens 2 is biconvex lens, the spherical radius of second lens 2 one side towards emergent light direction is 67.7mm, the spherical radius of second lens 2 one side towards incident light direction is 393.4mm, the center thickness of second lens 2 is 10.5 +/-0.05 mm, the material of second lens 2 is HF4 or its international trade mark.
3 biconcave lenses of third lens, the spherical radius of the one side of third lens 3 orientation emergent light direction is 48.5mm, the spherical radius of the one side of third lens 3 orientation incident light is 392.3mm, the center thickness of third lens 3 is 6.43 +/-0.05 mm. The third lens 3 is made of HZF4 and the international substitution mark thereof.
Fourth lens 4 is meniscus lens, and the arc bulge of fourth lens 4 is towards the incident direction, the spherical radius of fourth lens 4 towards the one side of emergent light direction is 289mm, the spherical radius of fourth lens 4 towards the one side of incident light is 52.3mm, the center thickness of fourth lens 4 is 10.5 +/-0.05 mm, fourth lens 4 material is HZK9B its international substitution trade mark.
The fifth lens 5 is a biconvex lens, the spherical radius of one surface of the fifth lens 5 facing the emergent light direction is 954.7mm, the spherical radius of one surface of the fifth lens 5 facing the incident light direction is 82.2mm, the center thickness of the fifth lens 5 is 12.3 +/-0.05 mm, and the fifth lens 5 is made of HZK9B and the international trade mark thereof.
The outer diameter range of the first lens 1 is 68-72 mm, the outer diameter range of the second lens 1 is 53-57 mm, the outer diameter range of the third lens 3 is 51-55 mm, the outer diameter range of the fourth lens 4 is 55-59 mm, and the outer diameter range of the fifth lens 5 is 69-74 mm.
The first lens 1, the second lens 2, the third lens 3, the fourth lens 4 and the fifth lens 5 are provided with antireflection coatings on two sides, the finish grade is higher than or equal to 80/50, the f-number of the lenses is less than or equal to 6, 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 five lenses, the aperture 7Fno of the lens is 2.5, the lens can be matched with an LCD light valve of 3.5-5.5 inch, the high resolution of 1080P can be achieved, the light utilization rate is high, the luminous flux output of the projector can be greatly improved, if a 4.5-inch screen is used, the off-axis degree can reach more than 65%, if a 5-inch screen is used, the off-axis degree can reach more than 20%, and the image of the picture corner is still clear.
In the embodiment, the projection ratio of the short-focus projection lens is 0.9 (using a 5inch screen) to 1.0 (using a 4.5 inch screen), a large picture of 100 inches can be projected when the distance between the surface of the lens at the front edge of the machine and the screen is 2m, and the short-focus projection lens has the advantage of projecting the large picture in a small space.
Under the condition that the transmission efficiency of the LCD light valve is 5.8-6.2%, the projector can output light flux of 330-500 lumens at the highest, and the brightness and the image quality of a projected image are greatly improved. The MTF of 70-90 inch full field can reach more than 50%, and the through focus of each field is uniformly and synchronously changed, the projection image quality is good, and the optical distortion is good
<0.35%, this embodiment is particularly suitable for the existing cheap LED light source, so it has the characteristics of low cost, easy to make, high optical imaging index, etc.
The above-mentioned only be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and all utilize this design right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (10)
1. A single-chip LCD projector lens, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a Fresnel lens are sequentially arranged from emergent light to incident light;
the lens aperture is positioned between the second lens and the third lens;
the first lens is a concave-convex lens, and the arc-shaped convex part of the first lens faces the emergent direction;
the second lens is a biconvex lens;
the third lens is a biconcave lens;
the fourth lens is a concave-convex lens, and the arc-shaped convex part of the fourth lens faces the incident direction;
the fifth lens is a biconvex lens;
the first lens, the second lens, the third lens and the fourth lens are coaxially arranged.
2. The single-chip LCD projector lens of claim 1, wherein: the air distance L1 between the first lens and the second lens is 12.02 +/-0.05 mm, the air distance L2 between the second lens and the third lens is 24.22 +/-0.05 mm, the air distance L3 between the third lens and the fourth lens is 2 +/-0.05 mm, and the air distance L4 between the fourth lens and the fifth lens is 0.4 +/-0.05 mm.
3. The single-chip LCD projector lens of claim 1, wherein: the spherical radius of the first lens towards one side of the emergent light direction is 182.6mm, the spherical radius of the first lens towards one side of the incident light direction is 58mm, and the center thickness is 4.5 +/-0.05 mm.
4. The single-chip LCD projector lens of claim 1, wherein: the spherical radius of the second lens towards the one side of emergent light direction is 67.7mm, the spherical radius of the second lens towards the one side of incident light direction is 393.4mm, the center thickness of second lens is 10.5 +/-0.05 mm.
5. The single-chip LCD projector lens of claim 1, wherein: the spherical radius of the third lens towards the one side of emergent light direction is 48.5mm, the spherical radius of the third lens towards the one side of incident light is 392.3mm, the center thickness of third lens is 6.43 +/-0.05 mm.
6. The single-chip LCD projector lens of claim 1, wherein: the spherical radius of the fourth lens towards the one side of emergent light direction is 289mm, the spherical radius of the fourth lens towards the one side of incident light is 52.3mm, the center thickness of fourth lens is 10.5 +/-0.05 mm.
7. A single-chip LCD projector lens as recited in claim 1, wherein: the spherical radius of one surface of the fifth lens facing the emergent light direction is 954.7mm, the spherical radius of one surface of the fifth lens facing the incident light direction is 82.2mm, and the center thickness of the fifth lens is 12.3 +/-0.05 mm.
8. The single-chip LCD projector lens of claim 1, wherein: the outer diameter range of the first lens is 68-72 mm, the outer diameter range of the second lens is 53-57 mm, the outer diameter range of the third lens is 51-55 mm, the outer diameter range of the fourth lens is 55-59 mm, and the outer diameter range of the fifth lens is 69-74 mm.
9. The single-chip LCD projector lens of claim 1, wherein: the first lens, the second lens, the third lens, the fourth lens and the fifth lens are provided with antireflection coatings on two sides, the finish grade is higher than or equal to 80/50, the f-number of the lens is less than or equal to 6, the local f-number is less than or equal to 1, and the eccentricity is less than or equal to 2 minutes.
10. The single-chip LCD projector lens of claim 1, wherein: the material of the first lens is HZK9B, the material of the second lens is HF4, the material of the third lens is HZF4, the material of the fourth lens is HZK9B, and the material of the fifth lens is HZK9B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222806220.6U CN218767543U (en) | 2022-10-25 | 2022-10-25 | Lens of single-chip LCD projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222806220.6U CN218767543U (en) | 2022-10-25 | 2022-10-25 | Lens of single-chip LCD projector |
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| Publication Number | Publication Date |
|---|---|
| CN218767543U true CN218767543U (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222806220.6U Active CN218767543U (en) | 2022-10-25 | 2022-10-25 | Lens of single-chip LCD projector |
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| CN (1) | CN218767543U (en) |
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- 2022-10-25 CN CN202222806220.6U patent/CN218767543U/en active Active
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