Manufacturing method of fingerprint acquisition optical fiber panel

Abstract

The invention discloses a manufacturing method of fingerprint acquisition optical fiber panel. The method comprises the steps of: inserting a core glass rod into a sheath glass tube for combination, and drawing the combination into a single optical fiber wire; drawing stray light absorption glass into a stray light absorption wire; arranging the single optical fiber wires into a cavity of a bar die, and inserting stray light absorption wires into the single optical fiber wires so as to form a composite bar; carrying out drawing to form a composite optical fiber; arranging the composite optical fibers once again into the bar die to form a secondary composite wire bar, and carrying out drawing to form an optical fiber panel blank bar; and rising the temperature of the optical fiber panel blank bar from a room temperature to about 600 DEG C for about 6 hours, maintaining the temperature for about 6 hours, then decreasing the temperature to about 30 DEG C for about 60 hours, then carrying out cutting to form the panel, and finally carrying out forming machining and fine machining. According to the invention, the material cost is low, the arranging and melting press processes are not needed, the production technology is simplified, the machining period is shortened, a large number of melting press dies, melting press furnaces and melting press equipment are not needed, the cost is substantially lowered, and the market competition demand of a fingerprint identification system is met.

Description

technical field [0001] The invention relates to the technical field of optical fiber panel production, in particular to a method for fabricating an optical fiber panel for fingerprint collection. Background technique [0002] The optical fiber panel is a hard optical fiber component composed of many closely arranged optical fibers. It has the characteristics of good light collection performance, high resolution, zero optical thickness, and can transmit high-definition images without distortion. , Widely used in input and output ports of various electronic optical devices. [0003] At present, the optical fiber panel has been used as a key component of some optical fingerprint recognition systems, which has the characteristics of small size and high recognition rate, and has gradually risen in the market. [0004] Existing fiber optic panel products are mainly used in high-end fields such as microscopic night vision, physical research, and medical treatment. They have high r...

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Problems solved by technology

[0004] Existing fiber optic panel products are mainly used in high-end fields such as microscopic night vision, physical research, and medical treatment. They have high requirements for raw materials, and they have to go through processes such as wire drawing, board arrangement, melting, rolling, cutting, and finishing, and the materials are expensive. , complex production, high cost

[0005] For the fingerprint recognition system, low price is an important factor of market competition. The production method of the existing optical fiber panel is not conducive to the popularization and use of its fingerprint recognition system due to its high cost.

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