Optical: systems and elements – Lens – With viewed object or viewed field illumination
Patent
1997-02-19
1998-07-07
Ben, Loha
Optical: systems and elements
Lens
With viewed object or viewed field illumination
359808, G02B 2702
Patent
active
057778051
ABSTRACT:
A magnifying device includes a translucent member having a first portion of a predetermined size and having first end of a predetermined convex shape and second end defining a circular cross-section surface portion, a generally cylindrical second portion of a predetermined size and having a diameter substantially equal in diameter to the second end of the first portion and having a first end generally defining a circular cross-section surface portion concentrically integrally formed adjacent with the second end of the first portion and having second end defining an annular cross-section surface portion, a third portion of a predetermined size having a first end generally defining a circular cross-section surface portion concentrically integrally formed adjacent with the second end of the second portion and having a second end of a predetermined smaller diameter than the first end of the third portion and defining a generally planar circular surface portion, wherein an angle is formed between about the second end of the first portion and the second end of the third portion such that when viewing from the convex end of the first portion through to the second end of the third portion a substantially magnified focused region is formed substantially at the second end of the third portion by virtue of the predetermined sizes.
REFERENCES:
patent: 4206978 (1980-06-01), Leopoldi
patent: 5021933 (1991-06-01), Cordes
patent: 5031918 (1991-07-01), Brill
patent: 5132849 (1992-07-01), Cordes
patent: 5331472 (1994-07-01), Rassman
Ben Loha
Graham R. William
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