Method for preparing double-sided composite thinning zoom concave lens
OwnerBingsong Wei, Hao Denginventors
Life of this patent
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Abstract
A method for preparing the double-sided composite thinning zoom concave lens, includes steps of: S1: establishing the a front surface mathematical model and a back surface mathematical model in an optical software; S2: establishing an evaluation function comprising an optimized value of astigmatism and an edge thickness of the lens; and S3: inputting a structural parameters of the lens blank and the prescription power, optimizing one by one using the least square method according to the evaluation function to obtain data of a front surface and a rear surface of the lens.
Claims10
A method for preparing a double-sided composite thinning zoom concave lens, comprising steps of:
- S1:
- establishing the a front surface mathematical model and a back surface mathematical model in an optical software, which is as shown in Equation 1 and Equation 2:
- f
-
- (
- x
- )
- =
- k
- 1
-
- x
- 2
- 1
- +
- (
- 1
- -
- p
- 1
-
- k
- 1
- 2
-
- x
- 2
- )
- 1
- 2
- Equation
-
-
- (
- 1
- )
- g
-
- (
- x
- )
- =
- k
- 2
-
- x
- 2
- 1
- +
- (
- 1
- -
- p
- 2
-
- k
- 2
- 2
-
- x
- 2
- )
- 1
- 2
- +
- Ax
- 4
- Equation
-
-
- (
- 2
- )
- wherein k1 is a paraxial curvature of the front surface, k2 is a paraxial curvature of the rear surface, p1 is a front surface aspheric coefficient, p2 is a rear surface aspheric coefficient, A is a higher order coefficient, and x is a radial radius;
- S2:
- establishing an evaluation function comprising an optimized value of astigmatism and an edge thickness of the lens;
- and
- S3:
- inputting a structural parameters of the lens blank and the prescription power to calculate k1, k2, optimizing one by one using the least square method according to the evaluation function to obtain p1, p2 and A.
Dependencies are inferred from the claim text.