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Optical device and its producing method, and laminated optical device and its producing method

A manufacturing method and technology of optical devices, applied in the direction of optical elements, optical elements, optics, etc., can solve problems such as difficulty in implementation, difficulty, cracking, etc., and achieve the effects of no solvent cracking, less light loss, and lower heating temperature

Inactive Publication Date: 2006-11-29
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since polyvinyl carbazole is a very brittle substance, it easily breaks under a small load, etc.
Therefore, as described in JP-A-10-268116, in order to press polyvinylcarbazole, which is an elastic resin, onto a diffraction grating to form an optical device, it takes a lot of time to press, and industrial implementation is very difficult.
And in recent years, the shape of the diffraction grating has become finer and more complicated, and it has become more difficult

Method used

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  • Optical device and its producing method, and laminated optical device and its producing method
  • Optical device and its producing method, and laminated optical device and its producing method
  • Optical device and its producing method, and laminated optical device and its producing method

Examples

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no. 1 Embodiment

[0086] Referring to Figures 1A-1C, Figures 2A-2C, and image 3 , to describe the first embodiment of the present invention. First, as shown in FIG. 1A , a mold 1 processed into a diffraction grating shape was heated to 280° C. in a nitrogen atmosphere, and then a commercially available powder 2 of polyvinylcarbazole (manufactured by ACROS Corporation) was supplied. A glass (BK7) flat plate 3 is placed on it, and as shown in FIG. 1B , molding is carried out at 280° C. and a pressure of 20 MPa for 2 hours. Then, after gradually cooling to room temperature for 4 hours, as shown in FIG. 1C, the hardened polyvinylcarbazole 2' was released from the metal mold 1 to form a diffractive optical device 4.

[0087] On the other hand, as shown in FIG. 2A, after heating the metal mold 5 processed into a diffraction grating shape to 280° C. in a nitrogen atmosphere, a photocurable resin 6 with optical characteristics (nd=1.513, vd=51.0) is flowed into the metal mold. Inside the mold 5. A ...

no. 2 Embodiment

[0097] A second embodiment of the present invention will be described with reference to FIGS. 8A to 8C. In this example, a solution 32 of 30 wt% polyvinylcarbazole (manufactured by ACROS) / chloroform was used instead of the powder 2 of polyvinylcarbazole (manufactured by ACROS) shown in the first example. In the second embodiment, the same reference numerals are assigned to the same components as those in the first embodiment, and description thereof will be omitted.

[0098]First, as shown in FIG. 8A, after heating the metal mold 31 in the shape of a diffraction grating to 280° C. in a nitrogen atmosphere, a solution 32 of 30 wt % polyvinylcarbazole (manufactured by ACROS) / chloroform was supplied. As shown in FIG. 8B , a glass (BK7) flat plate 33 was placed on it, and the solvent was dispersed at 70° C. for 24 hours. After vacuum drying at room temperature for 48 hours, as shown in FIG. 8C , the cured photocurable resin 32 ′ was released from the metal mold 31 to form a diffr...

no. 3 Embodiment

[0103] A third embodiment of the present invention will be described with reference to FIGS. 10A to 10C. In this example, N-vinylcarbazole 42 (manufactured by Tokyo Chemical Industry Co., Ltd.) was used as a fluid raw material for thermal polymerization instead of the powder of polyvinylcarbazole 2 shown in the first example. In the third embodiment, the same reference numerals are assigned to the same components as those in the first embodiment, and descriptions thereof are omitted.

[0104] First, as shown in FIG. 10A, after heating the metal mold 41 processed into the shape of a diffraction grating to 280° C. in a nitrogen atmosphere, N-vinylcarbazole 42 was supplied. As shown in FIG. 10B, a glass (BK7) plate 43 is placed on it, heated at 120° C. for 5 hours, and thermally polymerized and formed. By this heating, N-vinylcarbazole 42 is polymerized and converted into hardened polyvinylcarbazole 42'. Then, as shown in FIG. 10C , polyvinylcarbazole is released from the metal...

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Abstract

When a light beam is incident on a diffraction optical element at a large incidence angle, the light beam is shaded to generate flare or ghost, thereby increasing chromatic aberration. To solve this, polyvinylcarbazole is used as an optical element material to form a diffraction optical element in a mold by means of heat molding, solvent evaporation, thermal polymerization, photopolymerization, and the like. In particular, for the thermal polymerization and the photopolymerization, N-vinylcarbazole, i.e., fluid monomer, is supplied into a mold and is then polymerized. Even if the diffractive structure is complicated and fine, it can be easily shaped. An optical material to be used comprises polyvinylcarbazole added with a thermal initiator, a photoinitiator, a compound having two or more unsaturated ethylene groups with a photoinitiator, and the like.

Description

technical field [0001] The present invention relates to manufacturing methods of optical devices such as lenses, optical filters, mirrors, and refractive optical devices, optical devices, optical systems, optical materials, and image forming devices, and particularly to optical devices using large-scale optical materials with refractive index dispersion . Background technique [0002] Traditionally, in an optical system composed of multiple lenses that refract light, chromatic aberrations have been reduced by combining glass materials with different dispersion characteristics. For example, in an objective lens such as a telescope, a positive lens made of a glass material with a small dispersion and a negative lens made of a glass material with a large dispersion can be used in combination to correct chromatic aberration that occurs on the axis. Therefore, when the configuration and number of lenses are limited, or when the use of glass materials is limited, chromatic aberra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D11/00G02B5/18
CPCY10T428/31855B29D11/00769Y10T428/31909G02B5/1847B29D11/00442B29D11/00269G02B5/18
Inventor 宇久田秀雄大金政信
Owner CANON KK
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