Precise Axis Fixing Method for Off-Axis Aspheric Components
An off-axis aspheric surface and component technology, which is applied in the field of optical engineering, can solve problems such as inconvenient operation, limited precision of lens axis fixing, and inability to achieve wedge-shaped lens element axis fixing, etc., to achieve accuracy, high versatility and practicability Effect
Inactive Publication Date: 2018-01-12
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology
[0002] At present, the known method of fixing the lens axis is guaranteed by assembling the lens element into the machined reference hole or reference plane, or realizing the axis fixing through near-field collimation, so that the accuracy of lens axis fixing is limited.
In addition, the focus gauges and centering gauges on the market can only fix the axis of coaxial spherical elements with short radius of curvature and small diameter, which is inconvenient to operate, and cannot fix the axis of wedge-shaped lens elements
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[0018] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0019] See attached figure 1 , an off-axis aspheric element precision axis fixing method, according to the following steps:
[0020] Step 1: Place a standard mirror 2 on the rotary indexing table 3, and set up an autocollimator 1 on one side of the standard mirror 2, such as figure 2 As shown, adjust the posture of the autocollimator 1 so that the crosshair image reflected by the standard mirror 2 to be tested coincides with the inherent self-collimation crosshair of the autocollimator 1, that is, the surface normal of the standard mirror 2 is collimated. straight;
[0021] In this embodiment, the autocollimator 1 adopts the Collapex AC300 digital display photoelectric autocollimator, which has the functions of automatic data collection and storage, and is easy to realize intelligent control. Its ...
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The invention discloses a precise axis fixing method for an abaxial non-spherical element. According to a wedge angle value of a wedge-shaped lens given by a manufacturer, a wedge-shaped lens axis fixing criterion is established by virtue of a rotary indexing table, a standard lens, an autocollimation and an internal focusing telescope, then the wedge-shaped lens is added, the attitude of the wedge-shaped lens or the attitude of the internal focusing telescope is regulated, and a purpose of the precise axis fixing of the wedge-shaped lens is achieved by a method of criterion transition and the composite positioning of a plurality of criterions. The precise axis fixing method has the remarkable effects that a plurality of criterions are established to simultaneously monitor the normal of the plane and curved surface of the wedge-shaped lens through criterion copy propagation and wedge angle compensation on the basis of a plane and curved surface reflection far field imaging principle, and the accuracy of the fixed optical axis of the wedge-shaped lens is guaranteed; the precise axis fixing of the wedge-shaped lenses with different wedge angles, different calibers and different radiuses of curvature is realized, and the precise axis fixing method is higher in universality and practicality.
Description
technical field [0001] The invention relates to the technical field of optical engineering, in particular to a precise axis-fixing method for an off-axis aspheric element. Background technique [0002] At present, the known method of lens alignment is to ensure the alignment by assembling the lens element to the machined reference hole or reference surface, or realize the alignment by near-field collimation, so that the accuracy of lens alignment is limited. In addition, the focus gauges and centering gauges on the market can only fix the axis of coaxial spherical elements with a short radius of curvature and small diameter, which is inconvenient to operate, and cannot achieve the axis fixation of wedge-shaped lens elements. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a precise axis-fixing method for an off-axis aspheric element. This method is based on datum transition and simultaneous ...
Claims
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IPC IPC(8): G02B27/30G02B7/02G01B11/27
CPCG01B11/27G02B7/02G02B27/30
Inventor 徐旭独伟锋叶朗陈清海叶海仙刘青安林春刚魏春蓉
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS