Browse Prior Art Database

TWO POSITION IMAGE ROTATION DEVICE

IP.com Disclosure Number: IPCOM000023242D
Original Publication Date: 1977-Feb-28
Included in the Prior Art Database: 2004-Mar-29
Document File: 2 page(s) / 268K

Publishing Venue

Xerox Disclosure Journal

Abstract

Referring to the drawing, at the left a combination of two prisms 2 and 4 is shown within two half lenses 6 and 8. The inversions of an image passing through each prism suc-cessively is shown by stages. Only the effect of the prism is shown. The half lens at lower left and at top left form a real image of an object in the normal way. If the "R" at lower left is moved to be in the object plane and the "Re at the upper left is moved to the image plane, an additional

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 84% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

TWO POSITION IMAGE ROTATION
DEVICE
Edgar E. Price
Charles J. Kramer

This disclosure is
orientations of an
by 1800.

of a device which can provide two
optical image rotated about its center

Referring to the drawing, at the left a combination of two
prisms 2 and 4 is shown within two half lenses 6 and 8.
The inversions of an image passing through each prism suc-
cessively is shown by stages. Only the effect of the prism
is shown. The half lens at lower left and at top left form
a real image of an object in the normal way. If the "R" at
lower left is moved to be in the object plane and the "Re
at the upper left is moved to the image plane, an additional

Proposed Classification
U.S. Cl. 355/66
mt. Cl. G03b 27/70

4

2

8 8

Volume 2 Number 1 January/February 1977 71

[This page contains 1 picture or other non-text object]

Page 2 of 2

TWO POSITION IMAGE ROTATION DEVICE (Cont'd)

rotation of 180° will occur in the image.

If the prism combination is rotated 1800 about an axis per-
pendicular to the center vertical axis and at 45° to each
lower and upper axis, the two prisms will be reversed in
position. Then the successive images after reflection will
be shown in the right hand part of the drawing. The two
image positions will thus be rotated 1800 with respect to
each other as shown at top left and right.

If the prism is located in a Gauss Lens where there is a
long central air space there is enough room to rotate the
prism assembly. In a smaller lens, such as a 4-element
des...