Rod lens and laser marking apparatus

Details Rod lens and laser marking apparatus Rod lens and laser marking apparatus

2005-02-15

2005-02-15

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S726000, C359S629000, C033S227000

Reexamination Certificate

active

06856470

ABSTRACT:
A laser beam incident on a rod lens has a greater cross-sectional diameter than that of a rod lens main body, and mirrors are provided near the rod lens main body to reflect incident light toward the same. Since light of a strong beam intensity reflected onto the rod lens main body by the mirrors produces a greater angle than light of weak beam intensity, this configuration has an effect of increasing the light intensity on the ends of a resulting line beam and, thus, expands the spreading angle of visible light in the line beam.

REFERENCES:
patent: 5872657 (1999-02-01), Rando
patent: 6679609 (2004-01-01), Ohtomo et al.

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