Image forming apparatus having circuits for adjusting light beam

Details Image forming apparatus having circuits for adjusting light beam Image forming apparatus having circuits for adjusting light beam

1996-04-24

1999-09-07

Braun, Fred L

Electrophotography

Control of electrophotography process

Having temperature or humidity detection

347131, 399 51, 399 96, G03G 1504, G03G 2100

Patent

active

059500395

ABSTRACT:
The temperature and humidity around a photoreceptor drum and the total number of copied sheets of the photoreceptor drum are detected. Data LDATA for setting the intensity of a laser beam and data BDATA for setting the beam diameter according to the detected results are provided from an image control circuit to a laser drive circuit and a collimator lens drive circuit. The laser drive circuit corrects the intensity of the laser beam output from an LD package according to LDATA, and the collimator lens drive circuit controls the position of the collimator lens according to BDATA to correct the beam diameter of the laser beam.

REFERENCES:
patent: 4931815 (1990-06-01), Sato et al.
patent: 5325122 (1994-06-01), Hattori et al.
patent: 5450211 (1995-09-01), Kanai et al.
patent: 5473415 (1995-12-01), Hayashi et al.
patent: 5504588 (1996-04-01), Takeuchi et al.
patent: 5513012 (1996-04-01), Takeuchi et al.
patent: 5561743 (1996-10-01), Kanai et al.
patent: 5596444 (1997-01-01), Eguchi

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