Optical: systems and elements – Lens – With viewed object or viewed field illumination
Patent
1998-06-02
1999-08-10
Dang, Hung Xuan
Optical: systems and elements
Lens
With viewed object or viewed field illumination
359808, G02B 2702
Patent
active
059367849
ABSTRACT:
A magnifying device includes a translucent member having a first portion of a predetermined size and having a first end having a predetermined convex shaped surface and second end defining a surface portion, a second portion of a predetermined size and having a diameter substantially equivalent in diameter to the second end of the first portion and having a first end generally defining a surface portion concentrically integrally formed adjacent with the second end of the first portion and having second end defining a surface portion, a third portion of a predetermined size having a first end generally defining a surface portion 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 surface portion, wherein an angle is formed between the second end of the first portion and the second end of the third portion such that when viewing from the first 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: 5331472 (1994-07-01), Rassman
patent: 5777805 (1998-07-01), Gilman
Dang Hung Xuan
Graham R. William
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