JPH1029679A - Optical element storing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an optical element from being sticked with refuse by making a bottom case into a laminated body consisting of an inner case part and an outer case part made of a resin and making the inner case part of a foamed resin in a tool wherein optical elements are stored in spaces consisting of rectangular recessed parts formed longitudinally and transversely on the inner surfaces of a top and the bottom cases. SOLUTION: A storing tool for storing optical elements 8 made of quartz plate consists of a top case 1 and a bottom case 2 having step parts 5 on the bottom and longitudinal and transverse rectangular recessed parts 3 and 4. In addition, the optical elements 8 are positioned at the step parts 5 and are stored in the space parts. The top and bottom cases 1 and 2 consists of a foamed resin and are respectively formed by laminating an inner case part 11 and an outer case part 10 and the foaming ratio of the inner case part 11 is made larger than that of the outer case part 10. The inner case part 11 has elastic action thereby and the outer case part 10 has an appropriate hardness. Therefore, crest parts of the optical elements 8 are brought into contact with each other in rectangular recessed parts 3 and 4 and as there exists no defect by the elastic action of the inner case part 11, refuse can be prevented from being generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical element storage device (hereinafter referred to as a storage device) for storing optical elements such as a wave plate, a birefringent plate, a low-pass filter, a polarizing prism, and a beam splitter. The present invention relates to a storage device that is suitable for protecting an optical element.

[0002]

[Prior art]

BACKGROUND OF THE INVENTION Various types of optical elements are used in optical products such as videos and cameras, and the demand for them is increasing. One such thing is an optical element using quartz,
Due to its characteristics, it extremely dislikes attachment of dust. For this reason, the storage device for storing them is made with great care.

(Example of Prior Art) FIGS. 2 and 3 are views of a storage device for explaining a conventional example. FIG. 2 is a partially exploded view, and FIG. 3 is a partially cutaway sectional view. The storage device is composed of a lower case 1 and an upper case made of PET (polyethyl terephthalate). The upper and lower cases 1 and 2 have rectangular recesses 3 and 4 that are formed vertically and horizontally on their respective inner surfaces. On the bottom surface of each of the rectangular concave portions 3 and 4, a step portion 5 is provided on each side. In this example, the rectangular recess 3 of the lower case 1
Makes the height of the row-shaped wall portions 6 in the horizontal direction constant. And
The vertical row-shaped wall 7 has a step with respect to the horizontal row-shaped wall 6, and the height thereof is reduced.

[0004] The optical element is composed of a quartz crystal piece 8 having a rectangular shape, and a taper 9 is provided at each ridge portion of both main surfaces. The crystal blank 8 is held on the step 5 of the lower case 1 with its outer periphery covered by the upper case 2 and housed in the space defined by the rectangular recesses 3, 4. That is, the outer peripheral portions of both main surfaces of the crystal blank 8 are positioned at the step portions 5 of the rectangular concave portions 3 and 4,
The central portions of both main surfaces are accommodated with a gap between the inner surfaces of the upper and lower cases 1.

In such a device, after transportation, the upper case 2 is opened, and the crystal blank 8 is stored in the lower case 1 while being put into an automatic line and transported. And the row-shaped wall portion 6,
The side face of the protruding crystal blank 8 is grasped by an automatic hand machine (manipulator) by the step 7 and incorporated into an optical product. In addition, the taper 9 of the crystal piece 8 eliminates a minute defect of the outer peripheral portion or the storage device due to the contact with the upper and lower cases 1 and 2. In addition, there is a gap between the two main surfaces and the inner surfaces of the upper and lower cases 1 and 2 to prevent the main surfaces from being contaminated. For this reason, no dust or the like is generated due to the loss, and as a result, the quartz piece does not adhere to both main surfaces. Therefore, a series of automation is enabled.

[0006]

[Problem to be Solved by the Invention]

(Problems of the prior art) However, in the above configuration, since the crystal blank 8 needs to be tapered in order to prevent defects or the like, the cost increases. From this, it has been considered that, for example, the storage tool (particularly, the lower case 1) is formed of an elastic body such as rubber while leaving the ridge line as it is, thereby preventing loss. However, the lower case 1 is put into the automatic line and transported as described above. Therefore, an appropriate hardness is required, and it is insufficient to simply use an elastic body.

(Object of the Invention) An object of the present invention is to provide a high-quality storage device suitable for an automatic line by preventing dust from adhering to an optical element due to a defect or the like.

[0008]

The basic solution of the present invention is that the lower case is formed of an inner case portion and an outer case portion made of resin, and at least the inner case portion is made of foamed resin. .

[0009]

In this manner, the inner case section is made of a foamed resin and has an elastic action. Therefore, even if the ridge line portion of the optical element abuts against the inner case portion, the elastic action prevents the loss or the like, thereby preventing the generation of dust. Also, since the outer case part maintains an appropriate hardness,
Adapt to automatic line. Hereinafter, an embodiment of the present invention will be described.

[0010]

FIG. 1 is a partially cutaway sectional view of a storage device for explaining an embodiment of the present invention. The same parts as those in the prior art are denoted by the same reference numerals, and description thereof will be simplified. The storage tools are
As described above, the upper and lower cases 1 and 2 each have the stepped portion 5 on the bottom surface and the space portion for accommodating the crystal blank 8 and the rectangular recessed portions 3 and 4 in the vertical and horizontal directions. Then, the crystal blank 8 having the ridge line is positioned in the step 5 of the rectangular recesses 3 and 4 and housed in the space.

In this embodiment, each of the upper and lower cases 1 and 2 is made of a foamed resin, and is formed by laminating an outer case 10 and an inner case 11 respectively. And the inner case part 1
1 is formed to be larger than the outer case portion 11. In this example, the foamed resin is made of polyethylene, and the foam ratio of the inner case 11 is 10 times and the outer case is 1.5 times. Then, after firing, they are joined by heat welding. The inner case 11 was made of a PQ sheet (trade name: Toren Chemical), and the outer case 10 was made of softlon (Sekisui Chemical).

With such a configuration, the inner case 11
Has an elastic action because of a large foaming rate. Also,
Since the outer case 10 has a low foaming rate, it has an appropriate hardness. Therefore, even if the ridges of the crystal blank 8 come into contact with each other in the rectangular recesses 3 and 4 and rattle during transportation or transportation, the elastic action of the inner case 11 eliminates the loss and removes dust. Occurrence can be prevented. Therefore, no dust adheres to both main surfaces of the crystal blank 8. Further, the outer case part 10 maintains an appropriate hardness. Therefore, a series of automation is enabled. Further, in this embodiment, since not only the inner case portion 11 but also the outer case portion 10 are made of foamed resin, the impact is absorbed, the loss is prevented, and the generation of dust is prevented.

[0013]

[Other matters] In the above embodiment, the laminated body of the foamed resin is used together with the upper and lower cases 1 and 2. However, since the lower case 1 is usually on the lower side, only the lower case 1 may be the laminated body of the foamed resin. . Although the inner case 11 and the outer case 10 are both made of foamed resin, only the inner case 11 may be made of foamed resin. Further, the foamed resin is polyethylene, but urethane or the like may be used, and basically, any resin having hardness suitable for an automatic line may be used.

In addition, the vertical and horizontal row-shaped wall portions 6 of the lower case 3
7 is provided with a step, and the side surface of the crystal blank 8 is grasped by an automatic hand. However, the height of the vertical and horizontal row-shaped walls 6 and 7 is the same, and the main surface of the crystal blank 8 is vacuum-adsorbed. It may be taken out. Further, the step portions 5 of the rectangular concave portions 3 and 4 are provided on each side of the bottom surface, but may be provided on at least a pair of opposite sides. In short, in order to prevent the loss of the optical element, etc. and to be suitable for automation, at least the lower case using a foamed resin for the inner case part basically belongs to the technical scope of the present invention and deviates from its purpose. It can be changed appropriately within a range not to be performed.

[0015]

According to the present invention, a protective film having a larger elastic action than the case body is provided on at least the surface of the lower case.
It is possible to provide a high-quality storage device that is suitable for an automatic line by preventing dust from adhering to the optical element due to defects or the like.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view of a storage device for explaining an embodiment of the present invention.

FIG. 2 is a partially exploded view of a storage device for explaining a conventional example.

FIG. 3 is a partially cutaway sectional view of a storage device illustrating a conventional example.

[Explanation of symbols]

1 lower case, 2 upper case, 3, 4 rectangular recess,
5 steps, 6, 7 rows of walls, 8 crystal pieces, 9 taper, 10 outer case, 11 inner case.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Reference number in the agency FI Technical display location 0333-3E B65D 85/38 B

Claims (2)

[Claims] 1. An optical element having a rectangular recess formed on an inner surface of an upper and lower case vertically and horizontally and having opposing step portions provided on a bottom surface, and an outer peripheral portion of both main surfaces of a rectangular optical element. In the optical element housing having the optical element housed in the space formed by the rectangular recesses of the upper and lower cases and having a gap with respect to the center of both main surfaces of the optical element, the lower case is An optical element housing, wherein a laminated body of an inner case part and an outer case part made of a resin is also used, and at least the inner case part is made of a foamed resin. 2. The optical element storage device according to claim 1, wherein the lower case is made of a foamed resin in both the inner case portion and the outer case portion, and the expansion ratio of the inner case portion is larger than that of the outer case portion. .