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라이트런에서 MRC의 4QD Detector  - VIS/UV/IR 제품을 공급하고 있습니다.
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MRC 4QD Detector  - VIS/UV/IR is supplied by Lightrun. For detailed product descriptions and specifications, please refer to the information below or contact Lightun for further inquiries.

Product description

The 4QD detector is a detector with a 4-quadrant diode. The position of a laser beam on the diode can be displayed without delay on an oscilloscope or, 

if MRC’s beam stabilization system is used, in the plots of the software. Even fastest fluctuations are resolved.

The 4QD detector measures the center of the power distribution. It differs from both, beam profilers, 

which do not show positions in real time and do thus not resolve fast motions, and fast photodiodes, which do not measure beam positions at all. 

The 4QD detector is characterized by a very high spatial resolution. With suitable parameters, resolutions down to and even below 100 nm are possible (see

 figure 2). By using Invar, a material with a small coefficient of thermal expansion, the position is also maintained on long term. 

In combination with the Compact beam stabilization of MRC, it is the most commonly used detector.

For easy adjustment of the laser onto the sensor, the 4QD detector has position and intensity displays on the rear side.

 A vacuum and a clean room version are also available.

4QD - VIS/UV/IR

 • Most commonly used detector

 • Highest resolution (down to < 100 nm)

 • Fast position detection (up to 100 kHz)

Specifications

4QD standard

- Wavelength : 320 – 1100 nm

- Detection area : 10 x 10 mm2

- Gap : 30 µm

UV 4QD 3x3

- Wavelength : 190 – 1000 nm

- Detection area : 3 x 3 mm2

- Gap : 100 µm

IR 4QD InGaAs

- Wavelength : 900 – 1700 nm

- Detection area : Ø = 3 mm

- Gap : 45 µm

IR 4QD Germanium

- Wavelength : 800 – 2000 nm

- Detection area : 5 x 5 mm2

- Gap : 20 µm