Optical: systems and elements – Lens – With support
Patent
1994-06-17
1996-10-08
Ben, Loha
Optical: systems and elements
Lens
With support
359813, 359822, 2483164, 2483166, 248313, G02B 702
Patent
active
055637400
ABSTRACT:
A vise like device that has a pair of oppositely disposed jaws is disclosed. This vise is used to true the roundness of camera lenses. The jaws form arcs of a circle that corresponds to the size of the lens being repaired. The jaws are threaded to protect the threads on the frame. Once the lens frame is secure on the jaws, the vise is slowly opened, pulling the frame around the jaws until the correct diameter is reached and the frame is round. This procedure saves time because the frame becomes true automatically as the vise is opened. Thus, there is no need to continuously check the roundness against a standard as the process continues. Moreover, this process is more forgiving because the frame is gradually and gently trued up. This gradual process also eliminates the need to remove any over correction to the lens shape. Finally, once the lens had be trued, filters and other accessories can again be attached to the lens.
REFERENCES:
patent: 3652152 (1972-03-01), Thursby, Jr.
patent: 4103852 (1978-08-01), First
patent: 4586221 (1986-05-01), Wu
patent: 4632352 (1986-12-01), Stoll
patent: 4927237 (1990-05-01), Hart
Ben Loha
Tavella Michael J.
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