Polarization aberration analysis method for off-axis free-form surface optical system

A technology of optical systems and analysis methods, applied in optics, optical components, complex mathematical operations, etc., can solve problems such as inability to evaluate non-axisymmetric systems, and achieve the effect of avoiding blind design

Active Publication Date: 2021-06-08
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0005] In order to solve the problem that the existing polarization aberration analysis method cannot comprehensively evaluate the non-axisymmetric system

Method used

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  • Polarization aberration analysis method for off-axis free-form surface optical system
  • Polarization aberration analysis method for off-axis free-form surface optical system
  • Polarization aberration analysis method for off-axis free-form surface optical system

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Embodiment

[0069] like figure 2 As shown, a single-mirror optical system contains only one mirror. An analysis method for polarization aberration of an off-axis free-form surface optical system, based on the Z of the fringe Zernike polynomial 5 / 6 item as an example, including the following steps:

[0070] Step 1: Establish a free-form surface polarization ray tracing model, and add the propagation vector of light to the traditional two-dimensional Jones matrix Obtain the global vector polarization transformation matrix through polarization ray tracing The polarization characteristics of optical systems containing free-form surfaces can be better analyzed.

[0071] Step 2. Obtain the phase aberration of the system through Pauli decomposition: Jones matrix is a 2×2 complex matrix, with the identity matrix σ 0 and the Pauli matrix σ k (k=1,2,3) to represent:

[0072]

[0073]

[0074] Among them, c k for σ k Coefficient of ρ k and φ k corresponding to c k The real and ...

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Abstract

The invention discloses a polarization aberration analysis method for an off-axis free-form surface optical system, belongs to the technical field of optical system polarization characteristic analysis, and aims to solve the problem that the existing polarization aberration analysis method cannot comprehensively evaluate a non-axisymmetric system containing a free-form surface.The method comprises the following steps: establishing a free-form surface polarized light tracing model; obtaining the phase aberration of the system through Follicle decomposition; obtaining two-way attenuation of the system through singular value decomposition; obtaining phase delay of the system through singular value decomposition; adding a free-form surface; repeating the steps 1 to 4 to obtain the phase aberration, two-way attenuation and the phase delay of the off-axis free-form surface optical system, and making the difference between the phase aberration and the phase aberration of the off-axis system without free-form surface to obtain the influence of the free-form surface on the polarization aberration of the off-axis optical system; adjusting the Zernike coefficient representing the free-form surface to obtain the influence of the free-form surface on the overall polarization characteristic distribution of the system; and fusing scalar aberration into vector aberration for overall analysis, and facilitating system optimization.

Description

technical field [0001] The invention belongs to the technical field of polarization characteristic analysis of optical systems, and in particular relates to a polarization aberration analysis method of an off-axis free-form surface optical system. Background technique [0002] After the 20th century, ultra-precision machining technology has been greatly developed, and the processing of a series of non-rotationally symmetrical surfaces such as free-form surfaces is no longer a condition that restricts optical design. System is designed. [0003] Polarization aberration is the change of the polarization state when the light passes through the optical system, and the light that is not normally incident on the optical interface is one of the main factors causing the polarization aberration. Although the off-axis free-form surface optical system can effectively solve the bottleneck of the traditional coaxial optical system that is difficult to achieve large aperture, large field...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/16G02B27/00
CPCG06F30/20G06F17/16G02B27/0012
Inventor 史浩东李英超张艺蓝王超刘壮张肃战俊彤付强姜会林
Owner CHANGCHUN UNIV OF SCI & TECH
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