HEAT-LIGHT SEPARATION FOR A UV RADIATION SOURCE

• US 20160368021A1
• Filed: 06/30/2014
• Published: 12/22/2016
• Est. Priority Date: 07/03/2013
• Status: Active Grant

• Current Assignee: Oerlikon Surface Solutions Ag, PfAffikon (OC Oerlikon Corporation AG)
• Original Assignee: Oerlikon Surface Solutions Ag, Trubbach (OC Oerlikon Corporation AG)
• Inventors: Zuger, Othmar
• Granted Patent: US 11,052,423 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B05D 3/067 Curing or cross-linking the coating
• CPC Class Codes: F26B 3/28 by radiation, e.g. from the sun

Abstract

A device for applying UV radiation to substrates in a field of application. The device includes: a radiation source, which emits both UV radiation and visible light and infrared radiation in a spatial angle; and a radiation-selective deflecting mirror, which mostly reflects the UV radiation and mostly transmits the VIS and IR radiation. The deflecting mirror includes at least two flat mirror strips, which are tilted with respect to each other.

Claims

1-7. -7. (canceled)

8. Apparatus for exposing substrates to UV radiation within an application-area, whereby the apparatus comprises:

a radiation source which emits UV radiation as well as visible light and infrared radiation in a spatial angle.

a radiation selective deflecting mirror which reflects most part of the UV radiation and transmits most part of the VIS &

IR radiation

characterized by the fact that

the deflecting mirror comprises at least two flat mirror strips which are mutually inclined in such a manner, that they reflect the diverging direct radiation from the radiation source in direction to the application-area and thereby at least reduce the divergence and consequently lead to an increase of the surface intensity in the application-area.

9. Apparatus according to claim 8 characterized by the fact that the deflecting mirror comprises three flat mirror strips.

10. Apparatus according to claim 8 characterized by the fact that the apparatus comprises means for trimming the orientation of the mirror strips.

11. A method for manufacturing an apparatus according to claim 8 comprising the following steps:

providing a radiation source which can emit UV radiation as well as visible light and infrared radiation in a spatial angle

providing a deflecting mirror which can reflect most part of the UV radiation and can transmit most part of the VIS &

IR radiation

characterized by the fact that

for providing the deflecting mirror at least one flat glass plate is coated with an interference filter which is based on thin film layer systems, whereby the interference filter, for a predetermined impinging angle, substantially reflects UV radiation and substantially transmits VIS &

IR radiation and the at least one glass plate is dissected in strips subsequent to the coating, and at least two strips are mounted on a support in such a manner, that they are mutually inclined, and reflect the diverging direct radiation from the radiation source in direction to the application-area and thereby at least reduce the divergence and consequently lead to an increase of the surface intensity in the application-area.

12. The method according to claim 11 characterized by the fact that for assembling the deflecting mirror strips from glass plates coated with different interference filters are used.

13. Method according to claim 8 characterized by the fact that the deflecting mirror comprises three strips, preferably exactly three strips.