Gradient refractive index quartz glass lens

A gradient refractive index, quartz glass technology, applied in the lens, glass production, glass molding and other directions, can solve the problem that the quartz glass lens does not have good optical properties, achieve short preparation time, reduce use requirements, single production volume big effect

Active Publication Date: 2016-08-31
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems existing in the prior art, the present invention provides a gradient refractive index quartz glass lens, which aims to provide a quartz glass lens including a radial refractive index gradually decreasing and a radial refractive index gradually increasing quartz glass lens, Solve the technical problem that the quartz glass lens does not have good optical performance in the prior art

Method used

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  • Gradient refractive index quartz glass lens
  • Gradient refractive index quartz glass lens
  • Gradient refractive index quartz glass lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) A quartz glass liner with a diameter of 31mm and a thickness of 2mm is installed on the PCVD equipment and injected with SiCl 4 、C 2 f 6 、GeCl 4 , O 2 gas, the furnace heating temperature is 1100°C, the deposition begins under the action of high-frequency microwaves, the initial C 2 f 6 content at the maximum, GeCl 4 content is at a minimum, followed by C 2 f 6 The dosage is gradually reduced, GeCl 4 Gradually increase the dosage, a certain stage C 2 f 6 Reduce to 0, continue to pass GeCl 4 Deposition, the whole process of deposition takes 8 hours, and PCVD automatically finishes the whole deposition process.

[0061] (2) After the deposition is completed, transfer the liner to the shrink furnace and shrink at 2100°C. The liner rotates at a speed of 40r / min, and the temperature program is set. After the seal is formed from the middle, it expands to both sides and reaches the center. The channels are completely closed and condensed into a GRIN rod with a ...

Embodiment 2

[0068] (1) A quartz glass liner with a diameter of 35mm and a thickness of 3mm is installed on the PCVD equipment and injected with SiCl 4 、C 2 f 6 , SF 6 , O 2 Gas, the furnace body heating temperature is 1100°C, and the deposition begins under the action of high-frequency microwaves to generate F-doped SiO 2 , reducing the refractive index. Introduce a small amount of C initially 2 f 6 +SF 6 , to deposit a buffer layer, after a period of time, the C 2 f 6 +SF 6 Adjust the dosage to the maximum, then C 2 f 6 +SF 6 content gradually decreased, GeCl 4 The content gradually increased, and the deposition took 8 hours to complete the entire deposition process.

[0069] (2) After the deposition is completed, transfer the liner to the shrink furnace and shrink at 2100°C. The liner rotates at a speed of 60r / min, and the temperature program is set. After the seal is formed from the middle, it expands to both sides and reaches the center. The channels are completely clos...

Embodiment 3

[0072] (1) A quartz glass liner with a diameter of 50mm and a thickness of 4mm is installed on the PCVD equipment and injected with SiCl 4 、GeCl 4 , O 2 gas, the heating temperature of the furnace body is 1200°C, and the deposition begins under the action of high-frequency microwaves to generate Ge-doped SiO 2 , the initial access to GeCl 4 The content gradually increases, and the refractive index increases. After 2 hours of deposition, GeCl 4 When the amount reaches a certain value, it gradually decreases, and at the same time gradually adds C 2 f 6 +CF 4 +POCl 3 , a subsequent deposition time of 8 hours, the final GeCl 4 Dosage to minimum value, C 2 f 6 +CF 4 +POCl 3 Use the amount to the maximum value to end the entire deposition process, and the total deposition time is 10 hours.

[0073] (2) After the deposition is completed, transfer the liner to the shrink furnace and shrink at 2000°C. The liner rotates at a speed of 40r / min, and the temperature program is ...

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Abstract

The invention belongs to the optical device technology field and discloses a gradient refractive index quartz glass lens. A refractive index along a radial direction in an internal portion is continuously reduced or continuously increased and the refractive index is distributed in a circular symmetry mode relative to a symmetrical shaft of a lens so that a maximum refractive index difference of the refractive index of the gradient refractive index quartz glass lens and a pure quartz glass refractive index is + / -0.08. The lens does not contain harmful heavy metal elements of thallium and lead. Under the condition that an antireflection film is not plated, a maximum ultraviolet-visible-infrared light transmittance can reach 91%, a lens length scope is 1-50mm and a diameter scope is 0.1-50mm.

Description

technical field [0001] The invention belongs to the technical field of optical devices, and more specifically relates to a gradient refractive index quartz glass lens. Background technique [0002] Gradient refractive index (GRIN) lens refers to an optical lens whose internal refractive index changes continuously along a certain direction. There are three types of gradient refractive index distribution: radial gradient refractive index, axial gradient refractive index, and spherical gradient refractive index. Radial gradient index lenses are the most widely used and most concerned, in which the refractive index decreases continuously along the radial direction, and the light can converge to a point is called a self-focusing lens; the refractive index increases continuously along the radial direction, and the light The diverging effect is called a self-defocusing lens. Schematic diagrams of the optical paths of self-focusing and self-defocusing lenses are shown in figure 1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00C03B20/00C03B33/06C03C3/06C03C17/245C03C15/00
CPCY02P40/57G02B3/0087C03B20/00C03B33/06C03C3/06C03C15/00C03C17/245C03C2201/02C03C2203/40C03C2203/50C03C2218/153
Inventor 毛召召熊良明罗杰郭飞郭王欢
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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