# US 7,088,445 B2 · Light source

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- Number: US 7,088,445 B2
- Document ID: US7088445B2
- Status: Granted
- Kind: B2
- Application number: 10/241,863
- Filed: 2002-09-12
- Published: 2003-08-14
- Granted: 2006-08-08
- Earliest claimed: 2001-09-13
- Assignees: Berthold GmbH & Co. KG
- Inventors: David H. Tracy; Bernhard H. Radziuk; Klaus Fischer
- Web page: https://patentgrep.com/patent/US7088445B2

## CPC

- G01N 21/3103: {Atomic absorption analysis}
- G01N 2021/3118: {Commutating sources, e.g. line source/broad source, chopping for comparison of broad/narrow regimes}
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

A light source for an atomizing device, specifically an atom absorption spectrometer comprising one, two, or more lamps, whose ray can be selected by means of at least one two-dimensionally moveable optical selection element, and which can be directed in the direction of atomizing device. Fine-tuning is thereby achieved quickly with little constructive expenditure and with low costs. A very high degree of accuracy is possible from the selector through a rotational and highly adjustable rotation spindle.

## Claims

### Claim 1

Light source for an atomizing device with one, two or several lamps, the ray of which may be selected by means of at least one optical selector, the at least one optical selector moveable at least in the direction of the atomizing device characterized by the fact that a selector can be turned by means of a rotational spindle, and between radiation outlet windows of each lamp and selector, an at least one optical steering element is arranged.

### Claim 2 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that lamps are essentially linked to the selector and are arranged in a similar fashion to the selector.

### Claim 3 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that the steering element is a 90° steering element.

### Claim 4 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that the lamps are aligned in pairs diametrically facing each other in relation to the selector.

### Claim 5 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that, through the selector which can steer the ray received from the light source by means of the steering elements, the rotation spindle can be steered to the direction of axial rotation.

### Claim 6 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that the ray path of the light source is arranged subsequent to the selector and the optical central steering element, which the radiation essentially at 90° turns to the direction of atomizing device.

### Claim 7 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that a central steering element is arranged between the lamps to steer the ray between two adjacent lamps.

### Claim 8 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that an element selected from the group comprising a selector, a steering element, a central steering element, and combinations thereof is supplied as optical reflection elements.

### Claim 9 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that the rotation spindle is linked to a drive motor.

### Claim 10 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that a drive motor is provided as a stepping motor.

### Claim 11 (depends on 1)

Light source mentioned in claim 1, characterized by the fact that the lamp is a hollow cathode lamp or electrode free discharge lamp.