Medical lighting apparatus and medical imaging apparatus

• US 7,922,346 B2
• Filed: 03/13/2008
• Issued: 04/12/2011
• Est. Priority Date: 03/16/2007
• Status: Expired due to Fees

• Current Assignee: J Morita Manufacturing
• Original Assignee: J Morita Manufacturing
• Inventors: Kusakabe, Hiroaki, Hashimoto, Shusuke, Katsuda, Naoki, Nakayama, Yuzo, Matoba, Kazunari, Okawa, Shinichi
• Primary Examiner(s): O Shea; Sandra L
• Assistant Examiner(s): Dunwiddie; Meghan K
• Application Number:
  US12/075,715
• Publication Number:
  US 20080239697A1
• Time in Patent Office: 1,125 Days
• Field of Search: 362/3, 362/5, 362/8, 362/11, 362/16, 362/227, 362/232, 362/253, 362572-573
• US Class Current: 362/5
• CPC Class Codes: A61B 1/0607 for annular illumination
• CPC Class Codes: A61B 1/0669 at proximal end of an endoscope
• CPC Class Codes: A61B 1/0684 using light emitting diodes [LED]
• CPC Class Codes: A61B 1/24 for the mouth, i.e. stomatoscopes, e.g. with tongue depressors tongue depressors per se A61B13/00; Instruments for opening or keeping open the mouth combined with saliva removers A61C17/00; mouth openers for animals A61D15/00
• CPC Class Codes: A61G 13/10 Parts, details or accessories surgical drape sheets A61B46/00
• CPC Class Codes: F21W 2131/202 for dentistry
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An object of the preset invention is to provide a medical lighting apparatus capable of illuminating an affected part with proper illuminance while assuring a work space for an operator near the affected part. A medical lighting apparatus for irradiating an affected part with light includes: a light source (a light emitting element); a light condenser (a collimate lens and a condenser lens) for condensing light emitted from the light source; an image forming unit (an image lens) for forming an image on the affected part from the light condensed by the light condenser; and an aperture portion provided between the light condenser and the image forming unit and regulating passage of the light condensed by the light condenser.

Claims

1. A medical imaging apparatus for irradiating an affected part with light and capturing an image of the affected part, comprising:

a light source;

a light condenser for condensing light emitted from said light source;

an image forming unit for forming an image on said affected part from the light condensed by said light condenser;

an aperture portion provided between said light condenser and said image forming unit and regulating passage of the light condensed by said light condenser; and

an image capturing unit including an imaging device for receiving reflected light from said affected part via said image forming unit and said aperture portion and capturing an image of said affected part.

2. The medical imaging apparatus according to claim 1, further comprising:

a movable arm; and

a frame for fixing said light source, said light condenser, said image forming unit, and said aperture portion to a tip of said movable arm.

3. The medical imaging apparatus according to claim 1, wherein said light source has, as a light emitting element, one of a light emitting diode, a halogen lamp, a krypton lamp, and a semiconductor laser.

4. The medical imaging apparatus according to claim 1, wherein

said light source has a plurality of light emitting elements,

said light condenser includes:

collimate lenses each provided on a light emission face of each of said light emitting elements; and

a condenser lens formed in an approximately annular shape with a hole in an approximate center portion, and for condensing light from said collimate lenses, and

said image capturing unit receives reflected light from said affected part via said hole in said condenser lens.

5. The medical imaging apparatus according to claim 4, wherein said plurality of light emitting elements are disposed in an approximately annular shape.

6. The medical imaging apparatus according to claim 4, wherein said light emitting element is a light emitting diode.

7. The medical imaging apparatus according to claim 1, wherein said aperture portion is disposed near a beam waist of said light condenser.

8. The medical imaging apparatus according to claim 1, wherein said aperture portion has an approximately rectangular-shaped opening.

9. The medical imaging apparatus according to claim 1, wherein said image capturing unit is disposed on a central axis of said light condenser and said image forming unit and has a zoom mechanism.