JPS636942Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a registration adjustment mechanism for matching the relative positions of two imaging devices (hereinafter referred to as CCDs) in a two-plate solid-state imaging camera.

In a two-chip solid-state imaging camera, the light incident on the color separation prism inside the optical case is separated and imaged onto two CCDs, but the same image is formed on corresponding pixels of the two CCDs. To do this, the relative positions of the two must be matched with an accuracy of several μm.

Conventionally, two CCDs were used with extremely high precision like this.
In order to form an image, it is necessary to incorporate a fine movement mechanism in the X, Y and rotational directions into the CCD holding mechanism.Especially when the optical distance between the end of the optical case and the CCD is short, an adjustment mechanism is required. is complicated and requires a large amount of assembly and adjustment man-hours, and the adjustment is not smooth and causes deviations after adjustment.

On the other hand, there is a method of temporarily fixing the mounting plate that fixes the CCD to the optical case and adjusting the mounting plate using an external device, but the adjustment by operating the external device is not actually performed reliably, and the position adjustment of 1 to 2 μm is difficult. It takes an extremely long time.

The present invention eliminates the drawbacks of the conventional technology and provides a solid-state image pickup device adjustment mechanism with a simple structure that can stably hold a CCD and at the same time make fine adjustments in the X, Y directions and rotational directions.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a front sectional view of an optical section showing an embodiment of the present invention, FIG. 2 is a side view, and FIGS. 3a and 3b are partial projection views. In FIG. 1, an optical case 1 has a built-in color separation prism. The ends 2a, 2b of the color separation prism 2 and the rear parts 1a, 1b of the optical case 1 are located parallel to each other. A solid substrate 3 is fixed to the rear portion 1a of the optical case 1, and a mounting substrate 4 is rotatably mounted inside. The mounting board 4 has a dovetail groove at its central end, into which a sliding table 5 is inserted. Second
As shown in the figure, the sliding base 5 is threadedly engaged with an adjusting screw 6, and the adjusting screw 6 is attached to the mounting board 4. Furthermore, a CCD 11 is screwed onto the sliding table 5 by a fixing plate 7. Furthermore, a mounting board 8 having a dovetail groove at the upper center end is attached to the rear part 1b of the optical case 1, and a sliding base 9 is inserted into the inside of the mounting board 8. As shown in Fig. 3a, the sliding table 9
is screwed together with an adjustment screw 10, and the adjustment screw 10 is mounted on the mounting board 8. Further, a CCD 12 is fixed on the sliding table 9 by a fixing plate 13. Furthermore, the shutter 1 is located at the bottom of the mounting board 8.
4 has been inserted.

The actual registration adjustment of the solid-state image sensor adjustment mechanism having the above structure will be explained. The two-plate optical case 1 shown in FIG.
Look directly at 2. CCD11 and 12 respectively
Positioning marks are provided on the surface, and by matching the marks, relative positioning of the CCD is performed. First, the mounting board 8 on which the CCD 12 is attached is screwed to the rear 16 surface of the optical case 1. Next, the mounting board 4 is temporarily fixed with screws to the fixed board 3 on which the CCD 11 is mounted. Next, each CCD was examined using a microscope (not shown).
While observing the alignment marks provided on the surfaces of 11 and 12, the mounting board 4 is rotated to align it parallel. When the parallelization is completed, the mounting board 4, which was previously temporarily fixed, is completely fixed, and the CCD 11 is finely adjusted in the arrow x direction by adjusting the rotation of the screw 6. Furthermore, by adjusting the rotation of screw 10,
Perform fine adjustment of CCD12 in the arrow Y direction, and
Perform the relative position adjustment of 1 and 12. that time
Since both positioning marks provided on the surfaces of the CCDs 11 and 12 are viewed at the same time, and it is unclear how precisely the overlapping marks match, the adjustment accuracy of the shutter 14 is checked.

FIG. 3b is a detailed view of the shutter section, in which the shutter 14 is slid and its lower side is set at the center of, for example, a mark 15 marked on the CCD surface.
At that time, the upper part of the shutter 14 is
The alignment mark 15a of the CCD 12 is projected, and the alignment mark 15 of the CCD 11 is displayed below.
b is projected, the location where the lines of the marks 15 coincide with each other with the bottom edge of the shutter 14 as the border becomes a position for highly accurate positioning. When the alignment is completed, the shutter 14 is then pulled out and light is blocked. The sliding table 5 is fixed by tightening the push screws 16 on the side surface of the mounting board 4 and pressing the guide plate 17. The other slide tables 9 are similarly fixed by push screws and guide plates (not shown). At this time, the sliding table and the dovetail groove fit together with high precision and there is almost no gap, so no deviation occurs during fixation.

As described above, according to the present invention, by combining the simple structure of a dovetail groove and a sliding table and the shutter mechanism, it is possible to adjust a solid-state image sensor with smooth adjustment and extremely high positional accuracy in a short time. can. Furthermore, by using this mechanism, it is possible to perform all registration adjustments using not only CCDs but also CPDs and MOSICs in solid-state image sensors.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional front view of an optical part showing an embodiment of the present invention, Fig. 2 is a side view, Fig. 3a is a partial projection view,
FIG. 3b is a detailed view of the shutter section. In the figure, 1 is the optical case, 1a and 1b are the optical case ends, 2 is the color separation prism, 2a and 2b are the ends of the color separation prism, 3 is the fixed substrate, 4 and 8 are the mounting substrates, and 5 and 9 are the sliding bases. , 6 and 10 are adjustment screws, 7 and 13 are fixing plates, 11
and 12 is a CCD, 14 is a shutter, 15 , 15a, 15b are marks, 16 is a set screw,
17 is a guide board.

Claims (1)

[Scope of utility model registration request] A first mounting board having a dovetail groove is fixed to the outside of one window of the optical case, which has a color separation prism inside the optical case, and a window perpendicular to each optical axis. A first sliding base to which a solid-state image sensor is fixed is slidably inserted into the optical case, and an opening/closing plate is attached to the bottom of the first mounting board. A second mounting board having a dovetail groove is rotatably attached to a fixed plate outside the window, and a second sliding base to which a solid-state image sensor is fixed is slidably inserted into the second mounting board. A solid-state image sensor adjustment mechanism, characterized in that the relative positions of a plurality of solid-state image sensor picture elements on the optical case are adjusted by adjusting the relative positions of the plurality of solid-state image sensor picture elements on the optical case.