Method for producing optical element air gap

Abstract

A method for manufacturing an air gap between optical elements, comprising the following steps: preparing two optical elements; forming at least two gap parts on the surface periphery of one of the optical elements, and the gap parts are separated from each other; coating an adhesive on every two between two gap parts; bonding two optical elements by an adhesive; and curing the adhesive.

Description

technical field [0001] The invention relates to a manufacturing method of an air gap between optical components, which is suitable for optical projection equipment and other application fields, and especially relates to an optical component group, which is used to refract light or separate colors of light for the benefit of other Applications of optical components. Background technique [0002] In the manufacturing process of the air gap of general optical components, adhesives are usually used to fix high (thick) objects (such as optical fibers, etc.) or adhesives are combined with coating layers as gaps to form between two optical components. Air gaps with fixed pitches to create groups of optical elements with fixed gaps. [0003] Furthermore, the related technical content disclosed in US Patent No. 4,948,228 uses an air gap to separate two prisms, which uses the difference in refractive index between the two prisms and air to cause total reflection to achieve a rotating...

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Problems solved by technology

[0005] However, there are mainly two disadvantages in assembling the optical elements in the above-mentioned manner. One, since the adhesive 14 is a jelly-like substance, when it is coated on the peripheral surface of the optical element or on the gap portion and sticks together, the optical The air gap spacing between components is affected by the coating thickness and uniformity of the adhesive, and the thickness and uniformity of the air gap spacing cannot be accurately controlled; in addition, when an optical element is bonded to another optical element 11, the adhesive The amount and distribution uniformity of 14 are not easy to control, and the pressure applied during bonding is often uneven, so that pressure bonding is often accompanied by glue overflow. In addition to uneven distribution of adhesive 14, it also seriously Affect the thickness and uniformity of the air gap spacing, and cause contamination of optical components due to glue overflow or make the optical channel 21 shielded by the adhesive 14, thereby affecting the quality of the optical channel and reducing the overall efficiency

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