Rotating Dove Prism cont'd

TM 9-258

entirely different purpose. Light rays entering the upper

in panoramic telescopes by a second inversion in the

face of the prism are reflected once against the longest

900 objective prism. When this prism is rotated about its

face of the prism after which they continue along their

longitudinal axis, the image rotates in the same direction

original path out of the lower face. The image is inverted

with double angular speed (para 4-7d(4)).

only by the single reflection. This inversion of the image

is corrected

4-14