Home theater optical anamorphic widescreen lens

Abstract

The application discloses a home theater optical anamorphic wide screen lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from an object side, wherein the first lens is a concave object side cylindrical negative lens, the second lens is a convex object side cylindrical meniscus negative lens, the third lens is a convex object side cylindrical positive lens, the fourth lens is a concave object side cylindrical negative lens, the fifth lens is a convex object side cylindrical positive lens, and the sixth lens is a convex object side cylindrical positive lens; and the first lens to the sixth lens are all made of glass material. The home theater optical anamorphic wide screen lens is a standard lens, the lenses are all designed as cylindrical lenses to correct various aberrations, and the lenses are all made of glass material, so that the quality of the lenses and the definition of the lens are improved.

Description

Technical Field

[0001] This invention relates to a lens, specifically to a home theater optical anamorphic widescreen lens. Background Technology

[0002] The market demand for high-end home theater widescreen anamorphic lenses is very small. Therefore, there is a gap in the production and design of such lenses in China. However, with the rapid economic development and technological progress, the ultra-large screen effect of home theaters is attracting people who aspire to a better life, and the demand for matching widescreen anamorphic lenses is also increasing accordingly. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a home theater optical anamorphic widescreen lens to fill the gap in domestically produced lenses.

[0004] The technical solution provided by this invention is: a home theater optical anamorphic widescreen lens, comprising, from the object side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is a concave object-side cylindrical negative lens, including a first concave cylindrical surface and a second concave cylindrical surface. The second lens is a convex object-side cylindrical meniscus negative lens, including a third convex cylindrical surface and a fourth concave cylindrical surface. The third lens is a convex object-side cylindrical positive lens, including a fifth convex cylindrical surface and a sixth convex cylindrical surface. The fourth lens is a concave object-side cylindrical negative lens, including a seventh concave cylindrical surface and an eighth concave cylindrical surface. The fifth lens is a convex object-side cylindrical positive lens, including a ninth convex cylindrical surface and a tenth concave cylindrical surface. The sixth lens is a convex object-side cylindrical positive lens, including an eleventh convex cylindrical surface and a twelfth convex cylindrical surface. All six lenses are made of glass.

[0005] Preferably, the refractive index of the first lens is greater than 1.45 and less than 1.55, and the dispersion is greater than 70 and less than 93.

[0006] The refractive index of the second lens is greater than 1.85 and less than 1.95, and the dispersion is greater than 10 and less than 33.

[0007] The refractive index of the third lens is greater than 1.60 and less than 1.78, and the dispersion is greater than 20 and less than 33.

[0008] The fourth lens has a refractive index greater than 1.75 and less than 1.95, and a dispersion greater than 30 and less than 45.

[0009] The refractive index of the fifth lens is greater than 1.70 and less than 1.8, and the dispersion is greater than 30 and less than 43.

[0010] The refractive index of the sixth lens is greater than 1.45 and less than 1.55, and the dispersion is greater than 70 and less than 93.

[0011] Further preferred, the material of the first lens is HFK61-CDGM, with a refractive index of 1.4970 and a dispersion of 81.6;

[0012] The second lens is made of HZF72-CDGM material, with a refractive index of 1.923 and a dispersion of 18.9.

[0013] The third lens is made of HOYA FD270 from Japan, with a refractive index of 1.6843 and a dispersion of 26.8.

[0014] The fourth lens is made of HZLAF68N-CDGM material, with a refractive index of 1.83 and a dispersion of 39.2.

[0015] The fifth lens is made of HTF8-CDGM material, with a refractive index of 1.72 and a dispersion of 34.7.

[0016] The sixth lens is made of HFK61-CDGM with a refractive index of 1.497 and a dispersion of 81.6.

[0017] Further optimization yielded the following parameters for the lens:

[0018]

[0019]

[0020] The advantages of the home theater optical anamorphic widescreen lens provided by this invention are: all lenses adopt a cylindrical design to correct various aberrations; all lenses are made of glass, which improves the quality of the lenses and the clarity of the lens, thereby improving the performance of the lens. Attached Figure Description

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of the structure of the home theater optical anamorphic widescreen lens of the present invention;

[0023] Figure 2 This is the MTF diagram of the home theater optical anamorphic widescreen lens of the present invention;

[0024] Figure 3 This is a field curvature diagram of the home theater optical anamorphic widescreen lens of the present invention;

[0025] Figure 4 This is an optical distortion diagram of the home theater optical anamorphic widescreen lens of the present invention;

[0026] Figure 5 This is a relative illumination diagram of the optical anamorphic widescreen lens for home theaters according to the present invention. Detailed Implementation

[0027] The present invention will be further explained below with reference to specific implementation schemes, but this explanation does not limit the scope of the invention.

[0028] like Figure 1 As shown, this invention provides a home theater optical anamorphic widescreen lens, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side. The first lens is a concave object-side cylindrical negative lens, comprising a first concave cylindrical surface and a second concave cylindrical surface. The second lens is a convex object-side cylindrical meniscus negative lens, comprising a third convex cylindrical surface and a fourth concave cylindrical surface. The third lens is a convex object-side cylindrical positive lens, comprising a fifth convex cylindrical surface and a sixth convex cylindrical surface. The fourth lens is a concave object-side cylindrical negative lens, comprising a seventh concave cylindrical surface and an eighth concave cylindrical surface. The fifth lens is a convex object-side cylindrical positive lens, comprising a ninth convex cylindrical surface and a tenth concave cylindrical surface. The sixth lens is a convex object-side cylindrical positive lens, comprising an eleventh convex cylindrical surface and a twelfth convex cylindrical surface. All six lenses are made of glass.

[0029] This home theater optical anamorphic widescreen lens features cylindrical lenses to correct various aberrations; all lenses are made of glass, improving lens quality and clarity, thus enhancing lens performance.

[0030] As an improvement to the technical solution, the refractive index of the first lens is greater than 1.45 and less than 1.55, and the dispersion is greater than 70 and less than 93.

[0031] The refractive index of the second lens is greater than 1.85 and less than 1.95, and the dispersion is greater than 10 and less than 33.

[0032] The refractive index of the third lens is greater than 1.60 and less than 1.78, and the dispersion is greater than 20 and less than 33.

[0033] The fourth lens has a refractive index greater than 1.75 and less than 1.95, and a dispersion greater than 30 and less than 45.

[0034] The refractive index of the fifth lens is greater than 1.70 and less than 1.8, and the dispersion is greater than 30 and less than 43.

[0035] The refractive index of the sixth lens is greater than 1.45 and less than 1.55, and the dispersion is greater than 70 and less than 93.

[0036] As an improvement to the technical solution, the material of the first lens is HFK61-CDGM, with a refractive index of 1.4970 and a dispersion of 81.6.

[0037] The second lens is made of HZF72-CDGM material, with a refractive index of 1.923 and a dispersion of 18.9.

[0038] The third lens is made of HOYA FD270 from Japan, with a refractive index of 1.6843 and a dispersion of 26.8.

[0039] The fourth lens is made of HZLAF68N-CDGM material, with a refractive index of 1.83 and a dispersion of 39.2.

[0040] The fifth lens is made of HTF8-CDGM material, with a refractive index of 1.72 and a dispersion of 34.7.

[0041] The sixth lens is made of HFK61-CDGM with a refractive index of 1.497 and a dispersion of 81.6.

[0042] As an improvement to the technical solution, the lens parameters are as follows:

[0043]

[0044] Figure 2 The image shows the MTF transfer function of this lens under ideal master lens conditions. At 60 lp / mm, the contrast ratio across the entire field of view is no less than 85%, indicating extremely high optical performance.

[0045] like Figures 3 to 5 As shown, the meridional curvature and sagittal curvature of the home theater optical distortion widescreen lens are greater than -0.15mm and less than 0.15mm, respectively, and the optical distortion is greater than -8.1% and less than +1.1%, both meeting the imaging performance requirements. Its edge relative illumination reaches 70%. Compared to existing technologies, the lenses are all made of glass, improving the quality of the lenses themselves and the sharpness of the lens, thus enhancing its overall performance.

Claims

1. A home theater optical anamorphic widescreen lens, characterized in that: The screen lens has a total of six lenses, which are arranged sequentially from the object side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is a concave object-side cylindrical negative lens, including a first concave cylindrical surface and a second concave cylindrical surface. The second lens is a convex object-side cylindrical meniscus negative lens, including a third convex cylindrical surface and a fourth concave cylindrical surface. The third lens is a convex object-side cylindrical positive lens, including a fifth convex cylindrical surface and a sixth convex cylindrical surface. The fourth lens is a concave object-side cylindrical negative lens, including a seventh concave cylindrical surface and an eighth concave cylindrical surface. The fifth lens is a convex object-side cylindrical positive lens, including a ninth convex cylindrical surface and a tenth concave cylindrical surface. The sixth lens is a convex object-side cylindrical positive lens, including an eleventh convex cylindrical surface and a twelfth convex cylindrical surface. All six lenses are made of glass. The first lens has a refractive index greater than 1.45 and less than 1.55, and a dispersion greater than 70 and less than 93. The refractive index of the second lens is greater than 1.85 and less than 1.95, and the dispersion is greater than 10 and less than 33. The refractive index of the third lens is greater than 1.60 and less than 1.78, and the dispersion is greater than 20 and less than 33. The fourth lens has a refractive index greater than 1.75 and less than 1.95, and a dispersion greater than 30 and less than 45. The fifth lens has a refractive index greater than 1.70 and less than 1.8, and a dispersion greater than 30 and less than 43. The refractive index of the sixth lens is greater than 1.45 and less than 1.55, and the dispersion is greater than 70 and less than 93.

2. The home theater optical anamorphic widescreen lens according to claim 1, characterized in that: The first lens is made of HFK61-CDGM, with a refractive index of 1.4970 and a dispersion of 81.

6. The second lens is made of HZF72-CDGM material, with a refractive index of 1.923 and a dispersion of 18.

9. The third lens is made of HOYA FD270, with a refractive index of 1.6843 and a dispersion of 26.

8. The fourth lens is made of HZLAF68N-CDGM material, with a refractive index of 1.83 and a dispersion of 39.

2. The fifth lens is made of HTF8-CDGM material, with a refractive index of 1.72 and a dispersion of 34.

7. The sixth lens is made of HFK61-CDGM with a refractive index of 1.497 and a dispersion of 81.

6.

3. The home theater optical anamorphic widescreen lens according to claim 1, characterized in that: The lens specifications are as follows: 。

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