JPS5995505A - Optical axis adjusting device of reflection mirror - Google Patents

Abstract

PURPOSE:To facilitate an optical axis adjustment of a reflection mirror and to improve its adjustment precision by moving finely a reflection mirror base which is applied an elastic energizing force in one direction by an adjusting screw in the other direction against the energizing force. CONSTITUTION:The cavity 3 of the U-shaped base 6 where the reflection mirror 1 and a supporting plate 2 are fixed is charged with compressed foamed plastics and the adjusting screw 7 which is long enough to reach a base part 6a is provided to the opening end. Then, the adjusting screw 7 is turned in against the upward elastic energizing force of the foamed plastics 8 to adjust the optical axis of the reflection mirror 1 finely and easily to a specific inclination.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical axis adjustment device for a reflecting mirror that facilitates adjustment and improves adjustment accuracy.

As a conventional optical axis adjustment device for a reflecting mirror, for example, there is one shown in FIG. Two adjustment screws 4 and 5 are fixed at the open end of the p1 support base 6.
is provided. The adjusting screw 4 passes through the gap 3 and is screwed into the base 6a of the support base 6, and the adjusting screw 5 presses against the surface of the base 6a.

In the above configuration, after setting the gap 30 interval X to a predetermined value by adjusting the adjusting screw 5, the interval Adjust to the tilt. By adjusting the optical axis, highly accurate light control can be performed in various optical devices, for example, laser beam optical systems of scanning devices, printers, etc., or optical systems of copying machines.

However, in the conventional optical axis adjustment device for a reflecting mirror, the optical axis adjustment was not appropriate because the adjustment screw 5 makes a preliminary setting and then the adjustment screw 4 fixes the preliminary setting state. In this case, the adjustment work is troublesome and requires skill because the preliminary settings must be reset again (the optical axis must be adjusted while searching for an equilibrium point between the forces acting on the two screws). In order to facilitate the adjustment of the optical axis of the reflector and increase the accuracy of the adjustment, an elastic biasing force directed in one direction is applied to the reflector support base, and the biasing force is adjusted using an adjustment screw. The object of the present invention is to provide an optical axis adjustment device for a reflecting mirror, in which the reflecting mirror support is minutely moved in another direction against the movement of the reflecting mirror.

Hereinafter, the light adjustment arrangement of the reflecting mirror according to the present invention will be explained in detail.

FIG. 2 shows a first embodiment of the present invention, in which a support plate 2 supporting the reflector IQ is fixed on a U-shaped support 6 filled with a void 3 filled with foamed plastic 8 in a compressed state. An adjustment screw 7 is provided at the open end of the support base 6 to reach its base 6a.

In the above configuration, the optical axis of the reflecting mirror 1 can be adjusted to a predetermined inclination by screwing in the adjusting screw 7 against the upward elastic biasing force of the foamed plastic 8.

FIG. 3 shows a second embodiment of the present invention, and the explanation of parts common to the first embodiment is omitted.
The difference is that the compression spring 9 is entirely used instead of the compression spring 9. Adjustment of the optical axis can be performed in the same manner as in the first embodiment.

In the first and second embodiments described above, an elastic biasing force always directed upward is applied to the support base 6, but for example, an extension spring is provided in the gap 3 to apply an elastic biasing force always directed downward. In that case, when the adjustment screw 7 performs an adjustment operation against the elastic biasing force, the interval between the gaps 3 is adjusted in the direction of a dog.

As described above, according to the optical axis adjustment device for a reflector according to the present invention, an elastic biasing force in one direction is applied to the reflector support base, and the adjustment screw supports the reflector against the biasing force. Since the table is made to move slightly in other directions, it is possible to easily adjust the optical axis of the reflecting mirror and increase the adjustment margin.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the entire optical axis adjustment device of a conventional reflecting mirror. 2 and 3 are sectional views showing first and second embodiments of the present invention. Explanation of symbols 1...Reflector, 2...Support plate, 3...Gap, 6...Support stand, 7...Adjustment screw, 8...Foamed plastic, 9...Elasticity Hey, patent applicant: Fuji Xerox Co., Ltd. Densha agent, patent attorney: Shin Matsubara 2. Same person: Kiyo Junma Muraki.
1) Tadashi Difficult Questions Same
Atsushi Ueshima - Suzu
Hitoshi Ki Figure 1 Figure 3 25

Claims (1)

[Scope of Claims] A reflecting mirror support having a fulcrum at one end and a movable adjustment section at the other end, an elastic member that biases the movable adjustment section in one adjustment direction, and the movable adjustment section. 1. An optical axis adjustment device for a reflecting mirror, comprising an adjustment screw that is hooked between a predetermined reference point and moves the adjustment movable portion in another adjustment direction against the elastic member.