Reticle retention for optical apparatus
The disclosure relates to a reticle cell. The reticle cell comprises one or more pieces of reticle glass held inside a reticle ring by a retention washer; and a retention ring that retains the retention washer and engages the reticle ring and the reticle glass. The retention washer further includes...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The disclosure relates to a reticle cell. The reticle cell comprises one or more pieces of reticle glass held inside a reticle ring by a retention washer; and a retention ring that retains the retention washer and engages the reticle ring and the reticle glass. The retention washer further includes tabs that engage corresponding channels on the inside of the reticle ring to prevent rotation of the reticle glass. This provides a greater accuracy, greater ease of manufacture of the reticle cell and, allows for superior optical quality. |
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