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US 4,391,496 AGranted
Adjustment device for a pancratic objective of a stereomicroscope
AssigneeCarl-Zeiss-Stiftung
InventorsAlbert Schilling, Wolfgang Schob
Life of this patent
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Abstract
The invention contemplates adjustment mechanism for a pancratic objective, wherein each of two differently displaceable lens holders are nevertheless correctly driven by a single manual driving rotation, there being a variable-length corrective connection between the respective lens holders, and there being means operated upon manual adjustment of one holder for correctively varying the length of the connection to the other lens holder.
Claims4
An adjustment device for pancratic objectives, particularly for stereomicroscopes, comprising:
- first and second lens group holders, said first and second holders being displaceable differing amounts in the same direction along the optical axis of said objectives;
- a variable-length connecting element coupling said first and second holders, said connecting element including a first arm pivotally joined to said first holder, a second arm pivotally joined to said second holder, said first and second arms being pivotally joined to each other to form a pivot point;
- cam follower means disposed at said pivot point of said arms;
- external cam means disposed for engagement with said cam follower means;
- means for biasing said first and second holders together and to bias said cam follower means into engagement with said cam means;
- and
- means for displacing at least one of said first and second holders along said optical axis.
4 more elements
Dependencies are inferred from the claim text.