Figure 8-26. Range finder reticle patterns.

TM 9-258

Coincidence

reticle.

(b)

The

right

pattern forms the upper vertical and right horizontal

members of the coincidence reticle pattern. The right half

coincidence reticle (14, fig 8-23) in the right optical

of the coincidence reticle is alined with the left half of the

system is composed of a vertical line located on the

coincidence reticle to establish a reference calibration of

vertical axis of the coincidence reticle pattern (C, fig 8-

the instrument when the target image is brought into

26) and a horizontal line located at the top and to the left

coincidence.

of the vertical line. This pattern forms the lower vertical

(c)

Main boresight (gunlaying) reticle. The

and left horizontal bars of the coincidence reticle pattern.

main boresight (gunlaying) reticle (16, fig 8-23) is located

The left coincidence reticle (49, fig 8-23) is located in the

in the focal plane of the objective lens system, which

coincidence cell assembly of the right main housing. The

results in the target image and the reticle image

left coincidence reticle pattern (C, fig 8-26) is formed by a

(B, fig 8-26) being superimposed. The aiming point of the

vertical line located on a vertical axis of the reticle disk

pattern is a boresight cross, 2 mils x 2 mils, coinciding

and a horizontal line located at the bottom and to the

with the intersection of the vertical and horizontal

right

the

vertical

line.

This

geometric

8-25