Illumination – Light source and modifier – Laser type
Patent
1994-09-09
1997-12-16
Husar, Stephen F.
Illumination
Light source and modifier
Laser type
362246, 362800, 235472, F21P 100
Patent
active
056976992
ABSTRACT:
A lighting apparatus is provided which illuminates a two dimensional data reading area in a data reader and which includes a plurality of light sources which are arranged along one pair of opposing sides of the two dimensional data reading area. An optical axis for each of the light sources is inclined at a predetermined inclination angle with respect to a line that is normal to a reference surface of the data reading area. The optical axes of the light rays emitted from the light sources onto the reference surface are spaced from the pair of sides of the two dimensional data reading area, at a distance within a range of 0.1 to 0.34 times the length of the other pair of opposing sides of the two dimensional data reading area.
REFERENCES:
patent: 5179269 (1993-01-01), Horie et al.
patent: 5349172 (1994-09-01), Roustaei
Seo Shuzo
Tani Nobuhiro
Asahi Kogaku Kogyo Kabushiki Kaisha
Husar Stephen F.
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