Design method of diffractive optical element, diffractive optical element and design system
A diffractive optical element and design method technology, applied in the optical field, can solve the problems affecting the practicability and aesthetics of the projected pattern, missing points, poor pattern continuity and uniformity, etc.
Active Publication Date: 2022-04-08
JIAXING UPHOTON OPTOELECTRONICS TECH CO LTD
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Problems solved by technology
Due to the algorithm characteristics of DOE, when the line width of the target image is thin, the coordinate transformation and distortion correction operations will cause loss of points. If the diffractive optical element is designed using a spherical image with some missing points, the actual projected pattern will be larger. The continuity and uniformity are poor, which affects the practicality and aesthetics of the projected pattern
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[0040] In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive.
[0041] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific ori...
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The present invention provides a method for designing a diffractive optical element, which is characterized by comprising: S101: Obtaining a first light field pattern on a target plane; S102: Converting the first light field pattern on a target plane to a spherical surface the second light field pattern; S103: Compensate the missing points of the second light field pattern on the spherical surface, and match the gray value, so as to obtain the corrected third light field pattern; and S104: According to the first The three light field patterns are calculated to obtain the phase distribution of the diffractive optical element. This design approach improves the projection quality of the diffractive optical element.
Description
technical field [0001] The present invention generally relates to the field of optical technology, in particular to a design method of a diffractive optical element, a diffractive optical element designed by the method, and a design system. Background technique [0002] In some application scenarios, the patterns projected by diffractive optical elements (DOE) are required to have the characteristics of large field of view, complex graphics, and fine and clear lines. For example, when making a target map, it is necessary to use a thinner line width, or even a single-pixel line width, and then convert the planar target map with a complex pattern to a spherical surface, and design a diffractive optical element based on the spherical map. Due to the algorithm characteristics of DOE, when the line width of the target image is thin, the coordinate transformation and distortion correction operations will cause loss of points. If the diffractive optical element is designed using a ...
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IPC IPC(8): G02B27/00G02B5/18
CPCG02B27/0012G02B5/18G02B27/4266G02B27/4205G02B5/1842G02B5/1866G02B2005/1804
Inventor 冯辉赵辉
Owner JIAXING UPHOTON OPTOELECTRONICS TECH CO LTD