Radiating device and media exposure device
This invention relates to a media exposing device for exposing media. The media exposure device includes a holding structure; a substrate having a plurality of diodes mounted thereon; and a radiation modification element for modifying the radiation emitted by the diodes. The substrate and the radiation modification element are secured by the holding structure in an arrangement wherein the diodes can emit radiation from the device and wherein the radiation modification element is spaced from the diodes in the radiation path of the diodes; and a telecentric lens secured to the holding structure in an arrangement wherein the telecentric lens is substantially in register with the radiation path of the diodes.
1. A radiating device, including:
a holding structure;
a substrate having a plurality of diodes mounted thereon; and
a radiation modification element for modifying radiation emitted by the diodes;
wherein the radiation modification element includes a plate which allows the passage therethrough of radiation; and
wherein the radiation modification element includes a mask for masking the radiation in the form of an opaque layer deposited on said plate which is opaque to the radiation, the mask defining a number of apertures, each aperture substantially being in register with the radiation path of a particular one of the diodes;
wherein the radiation modification element further includes a filter for filtering the radiation, wherein said radiation filter is deposited on said opaque layer on said plate;
the substrate and the radiation modification element being secured by the holding structure in an arrangement wherein the diodes can emit radiation from the device and wherein the radiation modification element is spaced from the diodes in the radiation path of the diodes.
2. The radiating device according to claim 1 , wherein the mask is deposited on the plate via vapour deposition.
3. The radiating device according to claim 1 , wherein the filter includes at least one radiation filter layer.
4. The radiating device according to claim 1 , wherein each radiation filter layer covers at least a portion of the apertures.
5. The radiating device according to claim 4 , wherein each radiation filter layer is deposited on the opaque layer via vapour deposition.
6. The radiating device according to claim 4 , wherein each radiation filter layer is deposited on the opaque layer via hand painting.
7. The radiating device according to claim 4 , wherein each radiation filter layer is in the form of a gelatine filter deposited on the opaque layer.
8. The radiating device according to claim 1 , wherein the diodes are light emitting diodes emitting electromagnetic radiation substantially within the visible spectrum.
9. The radiating device according to claim 1 , wherein the diodes are light emitting diodes emitting electromagnetic radiation substantially within the ultra violet and/or infrared spectrum.
10. The radiating device according to claim 1 , wherein the radiation modification element is in the form of a glass plate.
11. The radiating device according to claim 1 , wherein the radiation modification element is an optic fibre plate in which the fibres are oriented with their axes substantially parallel to the radiation path of the diodes.
12. The radiating device according to claim 1 , wherein the holding structure includes a spacing element disposed between the substrate and the radiation modification element.
13. The radiating device of claim 12 , wherein the spacing element defines at least one opening and is disposed in an arrangement wherein each diode is in register with an opening of the spacing element.
14. The radiating device as claimed in claim 13 , wherein the spacing element defines a number of slots, each slot being in register with a different subset of the diodes;
and preferably wherein the spacing element is in the form of a ceramic plate.
15. The radiating device according to claim 1 , wherein the holding structure includes a base plate and a front plate adapted to be coupled to one another thereby to secure the other components of the device between said base and front plates.