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SPECTROPHOTOMETERS
 POLYUS Research & Development Institute offers two basic models of acousto-optical spectrophotometers. The AOS-3S Spectrophotometer is designed for optical coating monitoring in vacuum deposition systems and for testing of produced coatings. The AOS-3SL Spectrophotometer is designed for testing of optical coatings and it can be used as a universal desktop laboratory spectrophotometer.



AOS-Series Acousto-Optical Spectrophotometers

AOS-3 Acousto-optical spectrophotometer is the new device for high-speed measurement of optical coating characteristics.

General Principles
The acousto-optical spectrophotometer has a wide-aperture acousto-optical monochromator based on electronically tunable acousto-optical filter (AOTF). The AOTF uses a synthetic anisotropic crystal in which phase diffraction grating is formed by an ultrasonic wave propagating inside the crystal. The spatial period of this grating and, hence, wavelength transmitted through the AOTF are determinated by RF signal applied to the AOTF via piezoelectric transducer. Electronic tuning of this ultrasonic diffraction grating provides high-speed wavelength switching and high frequency (up to 3 kHz) of amplitude modulation.

Specifications
ModelAOS-3SAOS-3SL
Spectral range370 ... 1175 nm
Spectral bandwidth0.3 nm (404.7 nm)
0.5 nm (632.8 nm)
0.8 nm (1014.0 nm)
Wavelength accuracy±0.4 nm (370 ... 720 nm)
± 1 nm (720 ... 1175 nm)
Number of spectral points2 ... 2012 ... 255
Minimal spectral point measurement time5 ms
Typical spectral point measurement time40 ms
Photometric accuracy:
      reflectance (R in %)


      transmittance (T in %)		 ±(0.2 + 0.02R)% (400 ... 720 nm)
±(0.05 + 0.02R)% (720 ... 1100 nm)

±(0.2 + 0.01T)% (400 ... 720 nm)
±(0.05 + 0.01T)% (720 ... 1100 nm)		 ±(0.1 + 0.02R)% (400 ... 720 nm)
±(0.01 + 0.02R)% (720 ... 1100 nm)

±(0.1 + 0.01T)% (400 ... 720 nm)
±(0.01 + 0.01T)% (720 ... 1100 nm)
Features
  • Monitoring of non-quaterwavelength multilayer deposition
  • Theoretical simulation of deposition process
  • Transmission measurement for 0 ... 45° angles
  • Spectral measurements for different polarizations
  • Small influence (no more than 0.01%) of backside reflection from unpolished surface of measured sample
Power supply220V, 50/60 Hz, 250VA
Weight
optical unit
control unit
2.5 kg
12 kg
10 kg
12 kg

Only PC with RS-232C interface drives the spectrophotometers.


3 Vvedensky St., Moscow, 117342, Russia
tel:+7 095 3330389 fax:+7 095 3330256
e-mail: mail@polyus.msk.ru

http://www.polyus.msk.ru