Self-focusing lens glass and its production process and ion exchanging furnace

A technology of self-focusing lens and ion exchange, which is applied in the field of ion exchange furnace, can solve the problems of affecting the imaging quality of the lens, increasing lens chromatic aberration, large electric susceptibility, etc., and achieves the goals of protecting furnace wire, improving aberration, and increasing transparency. Effect

Inactive Publication Date: 2007-06-27
徐秋霜
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Problems solved by technology

[0003] Thanks to Tl 2 O has a large electrical susceptibility and is easy to ion exchange, usually Tl + Used in self-focusing lens glass, in order to increase the refractive index of the glass to increase the numerical aperture of the self-focusing lens,

Method used

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Embodiment 1 20

[0020] According to the self-focusing lens glass of the present invention, its weight ratio includes: 30-45% SiO 2 , 0-6% K 2 O, 5-12% Na 2 O, 6-12% ZnO, 32-46% Tl 2 O, 2-10% of B 2 o 3 , 0-5% Nb 2 o 5 . The proportioning composition of specific embodiment is shown in Table 1.

[0021] Furthermore, the average bridge oxygen number Y of the oxygen polyhedron is preferably 3. SiO 2 with B 2 o 3 The sum of the contents is preferably 50-59% according to mole percentage.

[0022] A method for producing self-focusing lens glass, the method sequence includes the following steps: ① glass batching, batching according to the above formula, ② melting, melting the batching in a quartz crucible to form a glass block, and then throwing the glass block into a platinum crucible for melting , ③ casting, ④ annealing, ⑤ optical cold processing, ⑥ grinding and polishing into cylindrical rods, ⑦ wire drawing, ⑧ ion exchange, ion exchange at a temperature higher than the glass transitio...

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Abstract

The present invention discloses a kind of self-focusing lens glass and its production process and ion exchanging furnace. The glass consists of SiO2 30-45 wt%, K2O 0-6 wt%, Na2O 5-12 wt%, ZnO 6-12 wt%, Tl2O 32-46 wt%, B2O3 2-10 wt%, and Nb2O 50-5 wt%, and has SiO2+B2O3 in 50-59 mol%, B2O3 or SiO2+B2O3 in 5-8 mol%, and average bridge oxygen number Y in the oxygen polyhedron of 3. The self-focusing lens glass producing process includes the following steps: preparing glass material, smelting, pouring, annealing, cold optical processing, grinding and polishing to form glass rod, drawing wire, ion exchanging, cold optical processing and filming. The ion exchanging furnace for the production is provided with three thermocouples with Kelvin scales inside the furnace, one acid-proof stainless steel inner container, three thermocouples in the furnace wall and one armored thermocouple.

Description

Technical field: [0001] The invention relates to optical glass, in particular to a self-focusing lens glass, a production method thereof and an ion exchange furnace used. Background technique: [0002] Radial variable refractive index lenses, that is, self-focusing lenses, have attracted special attention because of their small diameter, short focal length, large numerical aperture, and the ability to focus light beams and image objects. Therefore, it is a very important tiny optical basic component, which has important applications in optical fiber communication, optical fiber sensing, optical information processing and many other fields. However, there is a deviation between the imaging of the actual optical system and the imaging of the ideal optical system. This deviation of the imaging of the optical system is called the aberration of the system. After the self-focusing lens used for endoscopy is used for imaging, the image clarity is uneven, and the aberrations are ma...

Claims

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Application Information

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IPC IPC(8): C03C3/089C03C3/066C03B1/00C03B5/235C03B19/02C03B25/00C03B37/02C03C21/00C03C17/00
CPCC03C3/066C03C3/097C03C3/089
Inventor 蔡春平高秀敏徐秋霜强西林
Owner 徐秋霜
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