| 摘要 |
The invention describes a sleeve (1) for movably retained eyepiece tubes (2) for optical devices which rests with its eyepiece-side part (5) against the outer wall of the eyepiece tube (2), and with its housing-side part (6) fits around the inner wall of an opening (7) in the tube housing (3) provided for the eyepiece tube (2). The sleeve (1) is characterized an immovable fit on both device assemblies (2 and 3), and is securely protected against even unintentional removal. The result is to achieve a hermetic seal, impermeable to air and moisture, of the relevant parts of the optical device.
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