# US 2013/0155510 A1 · Objective for a camera

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- Number: US 2013/0155510 A1
- Document ID: US20130155510A1
- Status: Published application
- Kind: A1
- Application number: 13/766,411
- Filed: 2013-02-13
- Published: 2013-06-20
- Earliest claimed: 2010-08-17
- Assignees: Carl Zeiss AG
- Inventors: Michael Hoelz; Karl-Heinz Roesner; Peter Ruff
- Web page: https://patentgrep.com/patent/US20130155510A1

## CPC

- G02B 27/0006: {with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation (G02B1/18 takes precedence; cleaning in general B08B)}
- G02B 7/102: {controlled by a microcomputer (cameras with interchangeable lenses G03B17/14)}
- G03B 17/02: Bodies
- G03B 17/08: Waterproof bodies or housings
- G03B 17/12: with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

An objective for a camera defines an axis and includes an inner objective element and an outer objective element at least partially surrounding the inner objective element. The inner objective element and the outer objective element conjointly define an interface and are mounted so as to be rotatable relative to each other about the axis. A sealing system is disposed at the interface between the inner objective element and the outer objective element and the sealing system includes a plastic foil in contact engagement with the inner objective element and the outer objective element.

## Claims

### Claim 1

An objective for a camera, the objective defining an axis and comprising:
an inner objective element;
an outer objective element at least partially surrounding said inner objective element;
said inner objective element and said outer objective element, conjointly defining an interface and being mounted so as to be rotatable relative to each other about said axis;
a sealing system disposed at said interface between said inner objective element and said outer objective element; and,
said sealing system including a plastic foil in contact engagement with said inner objective element and said outer objective element.

### Claim 2 (depends on 1)

The objective of claim 1, wherein said plastic foil is in linear contact engagement with said inner objective element.

### Claim 3 (depends on 2)

The objective of claim 2, wherein said plastic foil has a first edge and said linear contact engagement with said inner objective element takes place at said first edge.

### Claim 4 (depends on 3)

The objective of claim 3, wherein said plastic foil is in linear contact engagement with said outer objective element.

### Claim 5 (depends on 4)

The objective of claim 4, wherein said plastic foil has a second edge in linear contact engagement with said outer objective element.

### Claim 6 (depends on 5)

The objective of claim 5, wherein said plastic foil is an annularly-shaped plastic foil.

### Claim 7 (depends on 6)

The objective of claim 6, wherein said inner objective element and said outer objective element are concentrically rotatable relative to each other.

### Claim 8 (depends on 6)

The objective of claim 6, wherein said inner objective element has a first groove formed therein against which said plastic foil lies.

### Claim 9 (depends on 8)

The objective of claim 8, wherein said first groove has a V-shape when viewed in section.

### Claim 10 (depends on 8)

The objective of claim 8, wherein said inner objective element has a surface facing toward said outer objective element and said surface and said first groove conjointly define a first transition; and, said plastic foil lies against said first transition.

### Claim 11 (depends on 10)

The objective of claim 10, wherein said outer objective element has a second groove formed therein against which said plastic foil lies.

### Claim 12 (depends on 11)

The objective of claim 11, wherein said second groove has a V-shape when viewed in section.

### Claim 13 (depends on 11)

The objective of claim 11, wherein said outer objective element has a surface facing toward said inner objective element and said surface of said outer objective element and said second groove conjointly define a second transition; and, said plastic foil lies against said second transition.

### Claim 14 (depends on 13)

The objective of claim 13, wherein said plastic foil has a width adapted to the clearance between said outer objective element and said inner objective element.

### Claim 15 (depends on 1)

The objective of claim 1, wherein said plastic foil has a thickness selected so as to cause said plastic foil to be elastically configured in the direction of said axis.

### Claim 16 (depends on 1)

The objective of claim 1, wherein said plastic foil is made of polyethylene terephthalate or polypropylene.

### Claim 17 (depends on 1)

The objective of claim 1, wherein said plastic foil is made of biaxial orientated polyester foil.

### Claim 18 (depends on 1)

The objective of claim 1, wherein said plastic foil is made of a thermoplastic plastic.

### Claim 19 (depends on 1)

The objective of claim 1, wherein said camera is a still camera or a video camera.

### Claim 20

An objective for a camera, the objective defining an axis and comprising:
an inner objective element;
an outer objective element;
said inner objective element and said outer objective element conjointly defining an, interface and being mounted so as to be rotatable relative to each other about said axis;
a sealing system disposed at said interface between said inner objective element and said outer objective element; and,
said sealing system including a plastic foil in contact engagement with said inner objective element and said outer objective element.