Details

Autor(en) / Beteiligte

• Takashima, Masatake
• Okada, Sadami
• Nishiyama, Hiromi
• Matsuda, Mikio
• Fujii, Kan‐ichi

Titel

Full color printer with a He‐Cd+ white‐light laser

Ist Teil von

• Review of scientific instruments, 1991-05, Vol.62 (5), p.1238-1245

Ort / Verlag

Woodbury, NY: American Institute of Physics

Erscheinungsjahr

1991

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A high resolution full color printer has been developed incorporating a He‐Cd+ white‐light laser, acousto‐optic modulators, a Galvano scanner, and a circular arc recording platen on a fine translation stage. The laser oscillates at three primary colors and is controlled to be within 1% intensity stability. The spot size of the laser beam on the recording platen is improved to be 50 μm in diameter while the positioning accuracy for both horizontal and vertical scans are achieved to be better than 25 μm. The exposing energy densities on the recording surface for red, green, and blue are measured to be 4.3, 8.4, and 8.4 erg/cm2, respectively. The energy densities exceed the required exposure energy for Polacolor ER 8×10 Land film. A ‘‘reversible coding method’’ has been applied to shorten the data process time for 153.6 Mbytes image data. As the result, a 250×200 mm2 color print can be produced in 2 min. To evaluate chromaticity of the color prints, a color estimator that consists of a colorimeter, a personal computer, and an X Y plotter is developed. The purity of color is found out to be high because of color matching between the laser wavelengths and the spectral sensitivity of the film.