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Resin molded article for optical element, method for manufacturing resin molded article for optical element, device for manufacturing resin molded article for optical element, and scanning optical device

A technology for resin molding and optical elements, which is applied in the field of manufacturing equipment for resin molding products for optical elements, and can solve problems such as reducing surface accuracy.

Inactive Publication Date: 2014-08-13
KONICA MINOLTA OPTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a time lag in the injection of the gas after filling the resin, so the flow velocity of the tip of the molten resin changes, and sometimes the surface of the tip of the molten resin has abnormal appearance such as stagnation marks due to the stop, and the surface accuracy is significantly reduced.

Method used

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  • Resin molded article for optical element, method for manufacturing resin molded article for optical element, device for manufacturing resin molded article for optical element, and scanning optical device
  • Resin molded article for optical element, method for manufacturing resin molded article for optical element, device for manufacturing resin molded article for optical element, and scanning optical device
  • Resin molded article for optical element, method for manufacturing resin molded article for optical element, device for manufacturing resin molded article for optical element, and scanning optical device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0060] structure

[0061] refer to figure 1 , the resin molded article for an optical element according to the first embodiment of the present invention will be described. figure 1 This is a schematic diagram of an example of a laser scanning optical device in which a resin molded product for an optical element is assembled.

[0062] figure 1 Among them, the laser scanning optical device includes a light source unit 1, a cylindrical mirror 2, a polygon mirror 3 as a deflection means, a Torek lens 4, plane mirrors 5, 6, and an fθ mirror 10 with fθ characteristics.

[0063] The laser light emitted from the light source unit 1 is condensed into approximately parallel light by a collimator lens (not shown in the figure), and then reflected by a cylindrical mirror 2, and the beam shape is changed into a substantially straight line in which the longitudinal direction is parallel to the main scanning direction. , reaching polygon 3.

[0064] The polygon mirror 3 has four deflec...

no. 2 Embodiment approach

[0146] Next refer to Figure 13 , Figure 14 , the resin molded article for optical elements according to the second embodiment of the present invention will be described. Figure 13 This is a plan view of a resin molded product for optical elements, Figure 14 This is a cross-sectional view of a resin molded product for optical elements. The fθ mirror 10 is representatively described for the resin molded article for an optical element according to the first embodiment, and the fθ lens 20 is typically described for the resin molded article for an optical element according to the second embodiment.

[0147] The fθ lens 20 is provided in the laser scanning optical device like the fθ mirror 10 . The fθ mirror 10 is different in that it has a mirror portion 13 that reflects laser light, whereas the fθ lens 20 has an optical surface 23 that transmits laser light. The fθ lens 20 having the optical surface 23 also has the same function as the fθ mirror 10, and converts the speed ...

Embodiment

[0168] The present invention is described below based on preferred embodiments. The resin molded product produced in the examples is the base material of the fθ mirror 10 . In the comparative example, it is also the base material of the fθ mirror 10 .

[0169] Adopt above-mentioned manufacturing device, manufacturing method, cavity shape is image 3 The types shown are molded separately using the following two types of molds.

[0170] Type 1

[0171] A=B=5.0mm

[0172] The evaluation of the two fθ mirrors obtained by molding confirmed that shape deterioration due to sinking etc. was suppressed on the entire first surface portion of both of them, and a mirror shape with high surface precision was obtained.

[0173]In addition, when this mirror was used in a scanning optical device using laser light with a wavelength of 408 nm, it was confirmed that the spot was highly focused and high-definition image formation was possible.

[0174] Type 2

[0175] As a comparative e...

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Abstract

To provide a resin molding for optical elements that can maintain high surface precision in order to effectively form the outside of the optical surface without cutting and removing the appearance abnormality such as retention, and the optical surface itself is not easily affected by curing shrinkage such as sinking Products and their manufacturing methods, manufacturing devices, and scanning optical devices. A resin molded article for an optical element has a first surface portion on a part of the surface of a base material molded from a resin, and has a hollow portion formed by injecting a fluid from the outside into the inside of the base material. The distance between the end portion and the end portion of the first surface portion near the first end portion is A, which is different from the end portion of the first end portion of the base material, that is, across the opposite side of the first surface portion When the distance between the second end portion of the second end portion and the end portion of the first surface portion near the second end portion is B, the relationship (A>0, B>0, A≤B) is satisfied.

Description

technical field [0001] The present invention relates to a resin molded product for an optical element, a method for manufacturing a resin molded product for an optical element, an apparatus for manufacturing a resin molded product for an optical element, and a scanning optical device. And the resin molded article for optical elements in which the hollow part is formed, the manufacturing method of the resin molded article for optical elements, the manufacturing apparatus of the resin molded article for optical elements, and the scanning optical device. Background technique [0002] Such optical elements are generally known to be made of glass, metal, or ceramics. In recent years, resins have been used for ease of molding, design freedom, and cost reduction. [0003] Such optical elements are used in a variety of applications. As an example, there are known devices that condense light emitted from a light source, image it on a recording surface, etc., and perform recording and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/00B29C45/26B29C45/77
CPCB29C2945/76167B29C2945/76411Y10T428/1352B29C2945/76454B29C2945/7604B29C2945/76585B29L2011/0058B29C2945/76257B29C2945/76943B29C45/0025B29C45/1704B29C2945/76488B29C2945/76474B29C45/7613B29C2945/76397B29C45/00B29C45/26B29C45/77
Inventor 原新一朗真岛利行松本安弘
Owner KONICA MINOLTA OPTO