Optical printer with character magnification

Optical printhead having thermal expansion stress relief

Optical printing device

Optical printing head

Optical printing head for line-by-line recording of picture and

Optical printing head for optical printing system

Optical protuberant bubble recording medium

Optical record blank and information record

Optical recorder having focus controlling means

Optical recorder with plural resolution recording

Optical recording and information elements

Optical recording and reproducing disc

Optical recording apparatus

Optical recording apparatus

Optical recording apparatus

Optical recording apparatus for varying pit width according to r

Optical recording carrier

Optical recording device

Optical recording device

Optical recording disc