FIELD: observation means.
SUBSTANCE: peephole comprises rotating unit made of two reflecting prisms that are set in the rectangular frame, positive lens, flat-concave lens whose surface is dull, housing, and nut.
EFFECT: simplified design.
7 cl, 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DOOR INSPECTION HOLE | 1995 |
|
RU2089931C1 |
| DOOR EYE-SIGHT | 1994 |
|
RU2082205C1 |
| WIDE-ANGLE COLLIMATING INDICATOR | 2008 |
|
RU2358304C1 |
| LASER RANGE-FINDER (VERSIONS) | 2007 |
|
RU2340871C1 |
| DOOR VIEWER SECURITY COVER | 2012 |
|
RU2600561C2 |
| SYSTEM FOR VIDEO OBSERVATION OF SPACE IN FRONT OF ENTRANCE DOOR | 1998 |
|
RU2149517C1 |
| MULTIFUNCTIONAL OPTICAL-LOCATION SYSTEM | 2008 |
|
RU2372628C1 |
| DEVICE FOR DETECTING OPTOELECTRONIC OBJECTS | 2009 |
|
RU2408910C1 |
| DEVICE FOR STEREOSCOPIC OBSERVATION OF OBJECTS | 0 |
|
SU1073741A1 |
| 0 |
|
SU482706A1 |
