JPS6157904A - Honeycomb mirror - Google Patents

Abstract

PURPOSE:To reduce curvature, to obtain an excellent optical image, and to decrease the total weight of an optical system by adhering the 1st plate material to one surface of a honeycomb material and the 2nd plate member to the other surface, and forming a reflecting surface as one external surface. CONSTITUTION:The honeycomb material 2 has, for example, aluminum foil adhered and is drawn in a hexagonal shape; and foil thickness is about 0.02-0.1 mm, cell size is about 3-9 mm, and thickness is about 10 mm. The plate mem ber 1 is a soda glass plate of about 2 mm in thickness obtained by, for example, a float manufacturing method. An adhesive 3 is applied over internal surfaces of two plate members 1, which are adhered together with the honeycomb mate rial 2 between; and then both surfaces of the plate members 1 are finished into specular surfaces by a both-surface polishing machine by using abrasive grains. Aluminum and SiO2 which forms a protection film are vapor-deposited on one specular surface part to form the honeycomb mirror.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a mirror used in an optical system of a copying machine or the like.

PRIOR ART AND THEIR PROBLEMS In a conventional mirror, a reflective surface is formed by depositing aluminum, silver, etc. on a glass plate or the like.

For this reason, large-sized bonds are heavy, and the weight of the glass causes it to bend, resulting in image distortion.

Means and Action for Solving the Problems The present invention provides a method for bonding a first plate-like member to one surface of a honeycomb core material and a second plate-like member to the other surface, and bonding at least one of these plate-like members. It is characterized by having a reflective surface formed on its outer surface, and by using a honeycomb core material in the middle part, it has succeeded in significantly reducing weight.

Embodiment As shown in FIG. 1, a honeycomb core material 2 is sandwiched between two upper and lower plate-like members 1 and bonded together with an adhesive 3 applied to each inner surface of the plate-like members 1.

As shown in FIG. 2, the honeycomb core material 2 is made by, for example, aluminum foil being glued or stretched into a hexagonal shape, and in this case, the aluminum material is A3052, A5056, A2024, or the like. The foil thickness is about 0.02 mm to 0.1 mm, the cell size is about 3 mm to 9 mm, and the thickness is about 10 mm.

The plate-like member l has a thickness of about 2 m, for example, by the float manufacturing method.
m soda glass plate. The reflective surface is formed by depositing aluminum and Si02 on the surface of the plate member 1.

As the adhesive 3, for example, 100° C. heat-resistant epoxy adhesive is used.

To explain the manufacturing method, adhesive 3 is applied to each inner surface of two plate-shaped members 1, and honeycomb core material 2 is sandwiched and bonded. Finish both sides to a mirror finish. The reason why both sides are polished at the same time is to reduce warpage caused by van der Waals forces. After that, aluminum and SiO2 as a protective film are vapor-deposited on one mirror surface to form a honeycomb mirror.

Hereinafter, specific usage examples of the present invention will be explained. FIG. 3 shows a sectional view of the optical system of a copying machine using two honeycomb mirrors 4.4'. Here, the platen glass 5 for holding the original 8 moves in the direction of the arrow, and the ring 1ρi image is reflected by the left honeycomb mirror 4, passes through the lens 6, and is reflected again by the right honeycomb mirror 4'. and is imaged on the photosensitive drum 7, which is rotating in the direction of the arrow. This is called a movable platen type optical system, and the honeycomb mirror 414
', the lens 6 is fixed. In addition, there are fixed platen type optical systems with moving mirror lenses.

Effects of the Invention Because the honeycomb mirror according to the present invention is lightweight, the mirror can be used as a third mirror.
Even when it is tilted and fixed as shown in the figure, there is little warpage due to its own weight, and a good optical image can be obtained. Furthermore, the weight of the entire optical system is reduced, and the support frame and the like can be made thinner. Particularly in copying machine mirrors for large drawings, the effect of weight reduction is remarkable.

Furthermore, in the fixed platen system in which the mirror moves, the mirror movement speed can be made faster than before due to the weight reduction, and vibrations are also reduced. Note that the weight can be reduced to about one-fourth of that of conventional glass types.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a honeycomb mirror of the present invention, FIG. 2 is a perspective view of a honeycomb core material, and FIG. 3 is a sectional view of an embodiment applied to an optical system of a copying machine. 1...Plate-shaped member 2...Honeycomb core material agent Patent attorney Mr. Yuyo - 2 others Figure 1 Figure 2 Figure 3

Claims (3)

[Claims] (1) A first plate member is adhered to one surface of the honeycomb core material, and a second plate member is adhered to the other surface of the honeycomb core material, and a reflective surface is formed on the outer surface of at least one of these plate members. Features a honeycomb mirror. (2) The honeycomb mirror according to claim 1, wherein the first plate-like member and the second plate-like member are both glass plates. (3) The honeycomb mirror according to claim 1, wherein the first plate-like member and the second plate-like member are both mirror-finished glass plates.