OPTICAL COMPONENT AND IMAGE PICKUP UNIT

• US 20090225455A1
• Filed: 03/04/2009
• Published: 09/10/2009
• Est. Priority Date: 03/07/2008
• Status: Active Grant

• Current Assignee: Konica Minolta OPTO Incorporated (Konica Minolta Inc.)
• Original Assignee: Konica Minolta OPTO Incorporated (Konica Minolta Inc.)
• Inventors: Itou, Hisanori, KAWASAKI, Toyotoshi
• Granted Patent: US 7,855,847 B2
• Time in Patent Office: Days
• US Class Current: 359/830
• CPC Class Codes: G02B 13/04 Reversed telephoto objectives
• CPC Class Codes: G02B 7/007 Pressure-resistant sight glasses
• CPC Class Codes: G02B 7/021 for more than one lens
• CPC Class Codes: G02B 9/12 having three components only
• CPC Class Codes: H04N 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Abstract

An optical component includes: an optical element; a sealing member in a ring shape arranged on the optical element; a stepped portion formed on a front of a circumference surface of the optical element; and a movement-restricting portion arranged at a rear of the optical element. The stepped portion restricts a movement of the sealing member toward a front of the optical element, and the movement-restricting portion restricts a movement of the sealing member toward a rear of the optical element.

Claims

1. An optical component comprising:

an optical element;

a sealing member in a ring shape arranged on the optical element;

a stepped portion formed on a front of a circumference surface of the optical element by changing an outer diameter of the optical element, the stepped portion restricting a movement of the sealing member toward a front of the optical element; and

a movement-restricting portion arranged at a rear of the optical element, and restricting a movement of the sealing member toward a rear of the optical element.

2. The optical component of claim 1,

wherein the optical element is a negative lens or a meniscus lens with a convex surface facing an object side of the optical element.

3. The optical component of claim 1,

wherein the optical element is a lens arranged at a forefront in a wide-angle lens group.

4. The optical component of claim 1,

wherein the movement-restricting portion is formed on at least one of the optical element and the sealing member.

5. The optical component of claim 1,

wherein the movement-restricting portion comprises a plate member on the optical element, the plate member being attached to a rear surface of the optical element so as to restrict the movement of the sealing member toward the rear of the optical element, the rear surface being substantially perpendicular to an optical axis of the optical element.

6. The optical component of claim 5,

wherein the plate member is an incident-light limiting member.

7. The optical component of claim 1,

wherein the movement-restricting portion comprises a portion formed on the optical element as one body with the optical element so as to restrict a movement of the sealing member toward the rear of the optical element.

8. The optical component of claim 1,

wherein the movement-restricting portion comprises a second stepped portion on the optical element, the second stepped portion being formed by changing the outer diameter of the optical element.

9. The optical component of claim 8,

wherein the second stepped portion is formed on a rear of the circumference surface of the optical element, and

the movement-restricting portion further comprises

a fit portion on the sealing member fitted to the second stepped portion.

10. An image pickup unit comprising:

a casing; and

an optical component of claim 1 arranged in the casing.