Photopolymerization apparatus

• US 6,159,005 A
• Filed: 05/15/1998
• Issued: 12/12/2000
• Est. Priority Date: 05/26/1997
• Status: Expired due to Fees

• Current Assignee: 3M ESPE AG (3M Company)
• Original Assignee: ESPE Dental AG (3M Company)
• Inventors: Koran, Peter, Kuerschner, Ralf, Herold, Wolf-Dietrich
• Primary Examiner(s): Manahan, Todd E.
• Application Number:
  US09/079,266
• Time in Patent Office: 942 Days
• Field of Search: 433/29, 606/3, 606/13, 606/16, 606/17, 257/13
• US Class Current: 433/29
• CPC Class Codes: A61C 19/004 Hand-held apparatus, e.g. guns
• CPC Class Codes: A61N 2005/0651 Diodes

Abstract

An apparatus for photopolymerizing synthetic materials, specifically dental materials containing camphor quinone or phosphine oxide as a photo-initiator, includes a light source constituted by a semiconductor base solid-state radiation emitter 12 which emits in the blue spectral range. Since the radiation emitter emits in a small useful spectral range only, any heat radiation is avoided. The overall device is formed as a small, light-weight and handy device with a built-in battery 15. The solid-state radiation emitter 12, which is preferably operated in the light emitting diode (LED) mode, may be arranged directly on the tip 20 of the apparatus which can be directed toward the treatment site.

Claims

1. An apparatus for photopolymerizing synthetic materials containing photo-initiators, said apparatus comprising a light source for emitting light in the blue spectral range, said light source being a solid-state radiation emitter on the basis of a semiconductor composed of elements of the main groups III and V of the Periodic Table,

wherein said radiation emitter is a laser diode emitting a forward beam used for polymerization and a backward beam used as a reference beam for controlling the intensity of said forward beam.

2. The apparatus of claim 1, wherein said semiconductor is made of gallium nitride.

3. The apparatus of claim 1, wherein said radiation emitter includes an LED.

4. The apparatus of claim 1, wherein said radiation emitter includes a laser.

5. The apparatus of claim 1, further comprising a tip portion adapted to be directed to a treatment site, wherein said radiation emitter is disposed directly on said tip portion.

6. The apparatus of claim 1, further comprising an optical waveguide having a spill end adapted to be directed toward a treatment site, and a light entry end, wherein said radiation emitter is disposed at said light entry end.

7. The apparatus of claim 6, wherein said optical waveguide and said radiation emitter are arranged in a fixed mutual orientation, and the entry end of said optical waveguide has an aperture sized and dimensioned in accordance with the cross-section of the beam emitted by said radiation emitter.

8. The apparatus of claim 7, wherein said aperture of said entry end is elliptical.

9. The apparatus of claim 1, further comprising a battery for supplying energy to said radiation emitter.

10. The apparatus of claim 9, wherein said battery is a rechargeable battery.

11. The apparatus of claim 1, wherein radiation emitter outputs pulses of radiation.