Apparatus for forming pattern
AssigneePENTAX Corporation
InventorTakashi Okuyama
Life of this patent
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Abstract
An apparatus for forming a pattern has a light source, a scanning unit, a memory, a pulse data selector, a control pulse signal generator, a control pulse signal generator, a writing pulse signal generator, and an optical modulator. The time-interval detector detects successively a time-interval that is a pass-time of the beam in each of a series of fine sections. The pulse data selector selects a set of pulse data, corresponding to the detected time-interval, from a series of sets of pulse data. The control pulse signal generator successively generates a sequence of control pulse signals in accordance with the selected set of pulse data.
Claims8
An apparatus for forming a pattern comprising:
- a light source that emits a beam;
- a scanning unit that scans the beam on a photosensitive material;
- a time-interval detector that successively detects a time-interval that is a pass-time of the beam in each section of a series of fine sections, said series of fine sections being defined by dividing a scanning-line at constant-intervals larger than a dot-pitch;
- a memory that is capable of storing a series of sets of pulse data that have a different data-array in accordance with the time-interval;
- a pulse data selector that selects a set of pulse data, corresponding to the detected time-interval, from the series of sets of pulse data;
- a control pulse signal generator that successively generates a sequence of control pulse signals in accordance with the selected set of pulse data;
- a writing pulse signal generator that successively generates a sequence of writing pulse signals in accordance with the sequence of control pulse signals, the sequence of control pulse signals controlling the output-timing of the sequence of writing pulse signals;
- and
- an optical modulator that modulates the beam in accordance with the sequence of writing pulse signals.
An apparatus for generating a sequence of control pulse signals comprising:
- a time-interval detector that successively detects a time-interval that is a pass-time of the beam in each section of a series of fine sections, said series of fine sections being defined by dividing a scanning-line at constant-intervals larger than a dot-pitch;
- a memory that is capable of storing a series of sets of pulse data that have a different data-array in accordance with the time-interval;
- a pulse data selector that selects a set of pulse data, corresponding to the detected time-interval, from the series of sets of pulse data;
- and
- a control pulse signal generator that successively generates a sequence of control pulse signals in accordance with the selected set of pulse data, the sequence of control pulse signals controlling the output-timing of a sequence of writing pulse signals for controlling an optical modulator.
A method for generating a sequence of control pulse signals comprising:
- detecting successively a time-interval that is a pass-time of a beam in each section of a series of fine sections, said series of fine sections being defined by dividing a scanning-line at constant-intervals larger than a dot-pitch;
- selecting a set of pulse data, corresponding to the detected time-interval, from a series of sets of pulse data, the series of sets of pulse data having a different data-array in accordance with the time-interval;
- and
- successively generating a sequence of control pulse signals in accordance with the selected set of pulse data, the sequence of control pulse signals controlling the output-timing of a sequence of writing pulse signals for controlling an optical modulator.
Dependencies are inferred from the claim text.