LENS ARRANGEMENT AND A MONITORING CAMERA COMPRISING THE LENS ARRANGEMENT

• US 20170139226A1
• Filed: 11/16/2016
• Published: 05/18/2017
• Est. Priority Date: 11/16/2015
• Status: Active Grant

• Current Assignee: Axis AB (Canon Inc.)
• Original Assignee: Axis AB (Canon Inc.)
• Inventors: ADERVALL, Mikael
• Granted Patent: US 10,310,291 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: G02B 7/04 with mechanism for focusing or varying magnification
• CPC Class Codes: G03B 17/02 Bodies
• CPC Class Codes: G03B 17/12 with means for supporting objectives, supplementary lenses, filters, masks, or turrets
• CPC Class Codes: G03B 3/02 moving lens along baseboard
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/685 performed by mechanical compensation
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source

Abstract

A lens arrangement for a monitoring camera and a monitoring camera including a lens arrangement is provided. The lens arrangement includes a lens member having a connection portion with an outer thread, an adjustment member having a through hole for receiving the connection portion and an inner thread corresponding to the outer thread, a holder member having a receiving portion for receiving the connection portion and an inner thread corresponding to the outer thread. The lens arrangement is assembled by the connection portion being screwed into the through hole and further into the receiving portion. The receiving portion has a top engagement surface and the adjustment member has a bottom engagement surface. The adjustment member is movable relative to the holder member by screwing between non-engaging and engaging states. In the engaging state, the bottom engagement surface wedgingly engages with the top engagement surface for locking the lens member.

Claims

1. A lens arrangement for a monitoring camera, the lens arrangement comprising:

a lens member having a connection portion provided with an outer thread,

an adjustment member having a through hole for receiving the connection portion and being provided with an inner thread corresponding to the outer thread, and

a holder member having a receiving portion for receiving the connection portion and being provided with an inner thread corresponding to the outer thread,

wherein the lens arrangement is assembled by the connection portion of the lens member being screwed into the through hole of the adjustment member and further into the receiving portion of the holder member,

wherein the receiving portion of the holder member has a top engagement surface and the adjustment member has a bottom engagement surface, and

wherein the adjustment member is movable relative the holder member by screwing between a non-engaging state and an engaging state of the lens arrangement in which engaging state the bottom engagement surface of the adjustment member wedgingly engages with the top engagement surface of the receiving portion of the holder member for locking the lens member.

2. The lens arrangement according to claim 1, wherein the receiving portion comprises a frustoconical seat forming the top engagement surface of the receiving portion of the holder member, and the adjustment member having a frustoconical protrusion forming the bottom engagement surface of the adjustment member.

3. The lens arrangement according to claim 1, wherein the adjustment member comprises a frustoconical seat forming the bottom engagement surface, and the receiving portion having a frustoconical protrusion forming the top engagement surface of the receiving portion of the holder member.

4. The lens arrangement according to claim 1, further comprising a biasing member arranged at a bottom side of the holder member, and adapted to engage the lens member in an assembled state of the lens arrangement for biasing the lens member in an axial direction thereof.

5. The lens arrangement according to claim 4, wherein the biasing member comprises an elastic gasket.

6. The lens arrangement according to claim 5, wherein the elastic gasket has a cross-section having a z-shape.

7. The lens arrangement according to claim 5, wherein the elastic gasket comprises a silicone rubber.

8. The lens arrangement according to claim 5, wherein the biasing member is arranged in contact with the lens member and the holder member for forming an environmental seat

9. The lens arrangement according to claim 5, wherein the biasing member has an annular shape.

10. The lens arrangement according to claim 1, wherein the holder member comprises an opening at a bottom side thereof, providing a free line of sight between the lens member and an image sensor being arranged in the vicinity of the bottom side.

11. A monitoring camera comprising the lens arrangement according to claim 1.