CGS device
Spectrometer Modules

ZEISS CGS Series Compact Grating Spectrometer

The high-performance, compact CGS UV-NIR covers the 190 nm up to 1100 nm spectral range. Its small size means it fits directly into at-line, on-line and in-line processes. It has high versatility with various detector options (CCD, PDA or CMOS).

  • High resolution
  • Small footprint
  • Ultra low stray light
  • Long-term calibrated
  • Fast readout
CYGUS® CMOS device
CYGUS® CMOS device

CYGUS® Latest evolution of CMOS spectrometers from ZEISS

CYGUS® is the new high-performance CMOS spectrometer series from ZEISS covering the 190 - 1100 nm spectral range. It offers great versatility in CMOS detector options with configurations for superior resolution, high sensitivity and fast readout.

CGS device side view

CGS Spectrometer design


ZEISS CGS spectrometers feature an SMA connector with custom entrance slit and high NA for maximized throughput. The aberration-corrected flat-field holographic grating allows for a resolution of < 2 nm over the 190 nm up to 1100 nm range. Three detector options are available: high-sensitivity, fast-readout CCD, a PDA sensor for highest SNR or the affordable CMOS versions for fast readout and good sensitivity.

CGS device back view

CGS Customized options

Your partner for OEM applications

  • Various slit sizes (10...50 μm) available
  • ZEISS gratings with different blaze wavelengths (230/400/750 nm) for optimized diffraction efficiency
  • CCD, PDA or CMOS detector options
  • Operating electronics with USB 2.0, 3.0/Ethernet
  • ZEISS Aspect Software or SDK
  • High scalability for volume production
Blue LED stripes

CGS Applications

Suitable for emission, absorbance & reflectance measurements

  • LED and display process & quality control
  • Semiconductor process control, e.g. optical emission spectroscopy, thin film & critical dimension measurement
  • Colorimetry
  • High pressure liquid chromatography (HPLC)
  • Environmental sensors
  • Biophotonics & pharmaceuticals


CGS CCD UV-NIR Fast acquisition & highest sensitivity
CGS CMOS UV-NIR Fast acquisition, good SNR, & cost effective
CGS CMOS UV-NIR Fast acquisition, high UV sensitivity & cost effective
CGS CMOS UV-NIR Fast acquisition, high UV sensitivity & cost effective


Spectral range

190 - 1015 nm

190 - 935 nm

190 - 1100 nm  

Resolution (FWHM)

2.2 nm (UV-VIS) / 2.5 nm (NIR)

2 nm

1.1 ... 2.5 nm (depending on slit with and detector type)

Stray light

< 0.1 % (@240 nm, NaI 10 g/l)

< 0.1 % (@240 nm, NaI 10 g/l)

Temperature drift

< 0.02 nm/K

< 0.02 nm/K

Optical entrance

SMA, entrance slit 43 μm (varied upon request)

SMA, entrance slit 37 μm (varied upon request)

SMA, entrance slit 13 μm or 43 μm (varied upon request)

Numerical aperture




538 l/mm, blazed for 230 nm

431 l/mm, blazed for 230 nm (400/750 nm on request)


Detector type

Hamamatsu BT-CCD S11156 (2048 px)

Hamamatsu NMOS S3903 (1024 px)

Hamamatsu CMOS S12198 (1024 px)

Hamamatsu CMOS S11639 (2048 px)

Hamamatsu CMOS S13496 (4096 px)

Pixel size

14 x 1000 μm

25 x 500 μm

25 x 500 μm

14 x 200 μm

7 x 200 μm









16-bit ADC

16-bit ADC

Integration time

> 0.03 ms

> 0.5 ms

> 0.1 ms

> 0.2 ms

> 0.4 ms


USB 2.0, 3.0 / Ethernet

USB 2.0, 3.0


Operating temperature

0 … 60 °C (non-condensing)

0 … 60 °C (non-condensing)

Dimensions L x W x H

78 x 30 x 75 mm3

80 x 30 x 75 mm3


ZEISS CGS spectrometer series

  • ZEISS CGS Series

    Compact Grating Spectrometer

    Pages: 6
    File size: 322 KB

    The latest evolution of CMOS spectrometers from ZEISS

    Pages: 3
    File size: 1 MB
  • ZEISS OEM Spectrometers for Semiconductor Process Control

    Semiconductor Process Control

    Pages: 4
    File size: 395 KB
  • ZEISS Spectrometer Modules

    Compendium of products, electronic components and software solutions

    Pages: 27
    File size: 2 MB

Operating electronics & software for ZEISS spectrometers

  • Operating electronics for spectrometers from ZEISS

    Depending on the detector type (CCD, CMOS, NMOS photodiode arrays), ZEISS offers custom, tailored operating electronics for our CGS spectrometer modules. This includes the preamplifier, front-end and USB/Ethernet interface electronics. Furthermore, ZEISS provides different software tools: ASPECT PLUS acquisition & analysis software or software development kits (SDK) for perfect integration in industrial environments.

  • Preamplifier electronics

    The preamplifier and the front end electronics are matched to the spectrometer module. Its task is the amplification of the low analog output signals from the detector array and minimizing possible analog signal interference.

  • Front end electronics

    Front end electronics act as an adapter between the preamplifier and the interface electronics of a spectrometer system. They preprocesses the amplified analog video signal and perform the analog to digital conversion. The digitized values are then forwarded as byte sequential data stream for the interface electronics. High dynamics and signal stability in the configurations are achieved thanks to quartz-precision timing and integrated filtering of supply voltages.

  • High-speed interface electronics

    ZEISS provides high-speed digital spectral data acquisition controllers with PCI, USB 2.0/3.0 and Ethernet interfaces for PC communication. The interface electronics board thereby acts as connecting piece between the front end electronics and the PC. The 10/100 Base-T Ethernet interface is recommended for long distance communication and is ideally suited for distributed systems and decentralized monitoring.

  • ZEISS software solutions

    ZEISS provides different software tools to meet spectroscopic analysis and automation needs. A convenient solution is provided by the ready-to-use ASPECT PLUS software package. Running under MS Windows, it easily enables the acquisition and analysis of spectral data. Furthermore, we offer Software Development Kits (SDK) consisting of programming libraries allowing maximum flexibility for user-specific applications.

    The Aspect PLUS software for acquisition and analysis of spectra with clear graphical interface runs on the latest Window versions and controls ZEISS spectrometers. Functions as spectra display, data handling routines, kinetics and calculation of concentrations or color and film-thickness evaluation modules are implemented.

    OSIS SDK is a software development kit to support development of software applications for ZEISS spectrometers. There are several ways to create an application from scratch using one of the provided templates. It is also possible to add OSIS SDK to your existing projects using NuGet packages. The 32/64 bit SDK and the underlying OSIS Framework are based on .NET Standard 2.0 and are not limited to a specific platform or architecture.

Contact & Service


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