Laser reactive media and apparatus and method for writing an image onto such media
AssigneeFortium Technologies, Ltd.
InventorsAnthony Miles, Robert Glyn Miles
Life of this patent
Estimating the term…
Abstract
An optical disk label writing method for writing a label on an optical disc uses a similar writing operation to that used to write data to the disc. The disc has a label side including a laser reactive material for forming the label image, and a tracking format that can be tracked by a writing laser in a similar way to a writing operation. A computer program is provided for converting a label image to a disk image file for writing to the label side.
Claims37
An apparatus for writing an image to a laser reactive image medium, wherein the reaction of said laser reactive image medium is dependent on a frequency of laser light received, the apparatus being arranged to apply to said medium a laser beam having a selected one of a plurality of discrete frequencies, and to generate at least one of said plurality of discrete frequencies by heterodyning two others of said discrete frequencies.
(canceled)
A laser reactive image medium comprising laser reactive material able to change colour in reaction to being illuminated with laser light, and wherein the colour change so effected is dependent on the frequency of laser light illuminating the laser reactive material, wherein the laser reactive material is able to react by changing to:
- a first colour if illuminated by laser light of a first frequency;
- a second colour if illuminated by laser light of a second frequency;
- and
- a third colour if illuminated by laser light having a frequency corresponding to the sum of the first and second frequencies.
(canceled)
(canceled)
A method of writing an image to a laser reactive image medium, wherein the reaction of said medium is dependent on a frequency of laser light received, comprising:
- applying to said medium a laser beam having a selected one of a plurality of discrete frequencies;
- and
- generating at least one of said plurality of discrete frequencies by heterodyning two others of said discrete frequencies.
(canceled)
An apparatus for writing an image to a laser reactive image medium, comprising:
- a laser generating device operable to selectively illuminate and vaporise at least one portion of said laser reactive image medium with a laser beam.
30-72. (canceled)
An optical drive for writing a label to an optical disc, comprising:
- first writing means operable to write a visible image to said optical disc;
- and
- a second writing means operable to write data to said optical disc;
- wherein said first writing means comprises a print head operable to emit simultaneously at least two beams of laser light.
77-82. (canceled)
A laser reactive image medium comprising a continuous layer of a laser reactive material able to change colour in reaction to being illuminated with laser light, wherein the colour change so effected is dependent on the frequency of laser light illuminating the laser reactive material, and wherein the laser reactive material is able to react by changing to:
- a first colour if illuminated by laser light of a first frequency;
- a second colour if illuminated by laser light of a second frequency;
- and
- a third colour if illuminated by laser light having a frequency corresponding to the sum of the first and second frequencies.
A laser reactive image medium comprising a continuous layer of a laser reactive material able to change colour in reaction to being illuminated with laser light, wherein the colour change so effected is dependent on the frequency of laser light illuminating the laser reactive material, and wherein the laser reactive material is able to react by changing to:
- a first colour if illuminated by laser light of a first frequency;
- a second colour if illuminated by laser light of a second frequency;
- and
- a fourth colour if illuminated by laser light having a frequency corresponding to the difference between the first and second frequencies.
Dependencies are inferred from the claim text.