FIELD: optical instruments. SUBSTANCE: device has ampoule in form of sleeve which is partially filled with liquid. Bottom of sleeve is made in form of ring at difference between outer and inner diameters equal to 1/8 to 1/10 diameter of entrance pupil of telescope eye-piece. Ampoule is hermetic and has doubled walls. EFFECT: enhanced efficiency. 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ANGLE GAUGE | 0 |
|
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|
SU1739348A1 |
| HORIZON-INDICATOR FOR OPTICAL INSTRUMENTS | 1991 |
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RU2010159C1 |
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| OPTICAL MEASURING INSTRUMENT WITH GONIOMETER | 1991 |
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| GONIOMETER FOR OPTICAL OBSERVATION INSTRUMENT | 1991 |
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| GONIOMETER FOR OPTICAL OBSERVATION DEVICE | 1992 |
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| FIELD GLASS | 0 |
|
SU1760509A1 |
