FIELD: optics.
SUBSTANCE: device has three positive components. First component is a single meniscus directed to subject by convex portion, second component is glued together from biconvex lens and negative meniscus, directed to eye by convex portion, third component is made in form of biconvex lens. For focus distances and refraction coefficient of third component certain relation are true, which are shown in inventive formula.
EFFECT: higher quality, broad angle, large extension distance of pupil - over ten focus distances, high level of aberration correction including lowered value of astigmatism and low distortion.
3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| OCULAR SYSTEM | 1996 |
|
RU2102784C1 |
| WIDE-ANGLE EYEPIECE | 2013 |
|
RU2548745C1 |
| RAPID EYEPIECE WITH REMOVABLE EXIT PUPIL | 2018 |
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RU2681246C1 |
| EYEPIECE WITH INCREASED EYE RELIEF OF THE EXIT PUPIL | 2017 |
|
RU2652660C1 |
| BINOCULAR OBSERVATION SYSTEM | 2003 |
|
RU2217782C1 |
| OBJECTIVE LENS WITH OFFSET ENTRANCE PUPIL | 2014 |
|
RU2574332C1 |
| EYEPIECE | 0 |
|
SU1728837A1 |
| MICROSCOPE OCULAR | 0 |
|
SU1714563A1 |
| OCULAR WITH REMOTE EXIT PUPIL | 0 |
|
SU1721578A1 |
| OPTICAL SYSTEM OF BINOCULAR OBSERVATION DEVICE | 1990 |
|
RU2030772C1 |
