FIELD: TV engineering. SUBSTANCE: afocal extension has two components: the first one is mde in the form of single biconvex lens and the second, has negative menisk turned with its concavity to object , and a biconcave lens. EFFECT: improved design. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| AFOCAL ATTACHMENT | 1993 |
|
RU2067309C1 |
| AFOCAL WIDE-ANGLE ATTACHMENT | 1992 |
|
RU2006050C1 |
| ZOOM LENS | 0 |
|
SU1339476A1 |
| WIDE-APERTURE WIDE-ANGLE LENS | 0 |
|
SU1674044A1 |
| LENS HAVING EXTENDED ENTRANCE PUPIL | 0 |
|
SU1064260A1 |
| FAST WIDE-ANGLE LENS | 1992 |
|
RU2041479C1 |
| OBJECTIVE HAVING EXTERNAL ENTRANCE PUPIL | 0 |
|
SU1739337A1 |
| AFOCAL ATTACHMENT | 0 |
|
SU822127A1 |
| LARGE-APERTURE LENS | 2010 |
|
RU2431164C1 |
| LARGE-APERTURE LENS | 2011 |
|
RU2455667C1 |
