Apparatus for adjusting light beam direction

Details Apparatus for adjusting light beam direction Apparatus for adjusting light beam direction

1988-02-03

1989-07-25

Bovernick, Rodney B.

350 64, 350286, G02B 2600, G02B 504

Patent

active

048506869

ABSTRACT:
An apparatus for adjusting light beam direction comprises, for instance, two prisms, i.e., a first and a second prisms arranged, in order, along an incident direction of light beam; an incident face of the first prism being parallel to a plane which is assumed to rotate an imaginary vertical plane perpendicular to the incident direction around a rotational axis by a first acute angle; an outgoing face of the first prism being parallel to a plane which is assumed to rotate the vertical plane around the axis by a second acute angle larger than the first one in the same direction as the latter; an incident face of the second prism being parallel to the outgoing face of the first prism and an outgoing face of the second prism being parallel to the incident face of the first prism, at the zero-adjusting state; and at least one of these prisms being able to adjustably rotate around the rotational axis. The apparatus may be incorporated into a scanning optical apparatus and makes it possible to make the incident and outgoing light beams parallel to one another and to restrict, to a low level or even to zero, the shift therebetween.

REFERENCES:
patent: 3378687 (1968-04-01), Schepler
patent: 4515447 (1985-05-01), Weimer et al.

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