ZOOM LENS BARREL
PURPOSE:To obtain a zoom lens barrel for an infrared detecting device which is improved in the radial position precision of a lens of a movable part. CONSTITUTION:A roller bearing unit 22 is arranged at a 1st movable frame 3 and a 2nd movable frame 4, which engages the internal cylinder 12 of a fixe...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | PURPOSE:To obtain a zoom lens barrel for an infrared detecting device which is improved in the radial position precision of a lens of a movable part. CONSTITUTION:A roller bearing unit 22 is arranged at a 1st movable frame 3 and a 2nd movable frame 4, which engages the internal cylinder 12 of a fixed frame 7 through the roller bearing 23 of the roller bearing unit 22; and the 1st movable frame 3 and 2nd movable frame 4 are slid by rolling to reduce the clearance and when the roll bearing 23 is assembled with an eccentric pin 24, the clearance is made adjustable. |
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