Wasatch Photonics

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WP VIS Spectrometer

Optimize this high sensitivity VIS spectrometer with our build-to-print resolution and sample coupling options.

  • 400-800 nm wavelength range
  • Benchtop quality data, “compact” price
  • Up to 30x faster measurements
  • Superior stray light suppression, high SNR
  • Trace-level limit of detection
  • High thermal stability & reproducibility
  • Fiber-coupled & free space models
  • ENLIGHTEN™ spectroscopy software – included!
Download Full Specifications

We believe you should have full control and maximum flexibility when configuring your VIS spectrometer. That’s why we offer so many build-to-print options for range, resolution, detector cooling, and sample coupling – backing each with our advice and experience. Learn more about each below, or contact us to discuss the best options for your application.

SLIT WIDTH: Defining Resolution

Sensitivity and resolution are competing factors when choosing slit size. A larger slit allows more light to enter the spectrometer, increasing sensitivity for low-light applications such as fluorescence. Resolution improves, however, as slit width is reduced (though not always linearly). We offer 25 and 50 μm slits for our VIS spectrometer, and can advise on the best choice for your application. Due to the high sensitivity of our low f/# spectrometer designs, it is often possible to use a smaller slit width than would be required with a typical f/4 spectrometer, allowing you to achieve higher resolution.

SAMPLE COUPLING: Fiber or free-space?

How you interface with your sample can vary depending on the type of sample, environment, and the goals of your measurement. Whether you need to sample remotely or create a compact design, we have options for you. The sampling coupling option is chosen at time of spectrometer order, but can be exchanged by special order.

WP-VIS-fiber-couplingFiber coupling to spectrometer (-SMA)

Using a fiber to route light to and from your sample is both flexible and convenient, and can help to minimize interference from ambient light in the measurement path. To get superior signal and ultra low background from our f/1.3 design WP VIS spectrometer, we recommend the use of matched NA fibers (0.36-0.39).  The image at left shows the SMA connector input to our spectrometer. A custom FC/PC input is available upon request (-FC).


Free-space coupling to spectrometer – open slit (-FO)

Coupling light directly into a spectrometer slit gives you the freedom to design your own sampling optics, controlling parameters like sampling spot size and working distance. This approach is good for creating compact systems while minimizing coupling losses due to fibers, and is ideal for research & OEMs. Our WP VIS spectrometer has a 0.36 NA input (shown at left), accepting light up to 21° off axis (42° full angle).


WP-free-space-lensFree-space coupling to spectrometer – collimating lens (-FL)

Our collimating lens input option allows you to employ free-space coupling to your spectrometer with a more limited field of view. The integrated collimating lens is perfectly matched to the WP VIS 0.36 NA design to focus light onto the slit. This option is compatible with our quick-fit cuvette holders used for absorption, transmission, and fluorescence measurements. It can also be used to couple directly to a microscope, other optics, or for directional sensing.

The WP VIS spectrometer may be configured with your choice of slit size and sample coupling (fiber coupled or free space). Custom wavelength range models are available upon request, so call us to discuss your OEM needs!

Need a broader range extending into the NIR? Try our WP VIS-NIR spectrometer,  covering 400-1080 nm.

  • f/#: 1.3
  • Spectral Range: 400 - 800 nm
  • Resolution, 25 um slit: 1.5 nm
  • Resolution, 50 um slit: 2.5 nm
  • Fiber Port: SMA 905 (fiber coupled model) ; free space coupled model available
  • Size: 16.5 x 12.7 x 5.1 cm

The WP VIS spectrometer is offered with an uncooled detectors. Our high-sensitivity design allows you to capture spectra with excellent signal to noise in a fraction of the time of many spectrometers with cooled detectors, at lower cost. See the  ‘Choose your model’ tab for more information on spectrometer configuration options.

  • Detector Type and Model: Hamamatsu S10420-1006 CCD
  • Active Pixels: 1024
  • Integration Period Range: 7 ms - 60 s
  • System Operating Temperature Range: 0°C to 40°C, non-condensing
  • Data Interface: USB 2.0 Type B receptacle

Engineering Documents

  • ENG-0001 > Spectrometer USB Interface Specification
  • ENG-0034 > Feature Identification Device (FID) EEPROM Specification

Brochures & Product Sheets

Tech Notes

We’ve maximized the efficiency of our VIS spectrometer to give you more sensitivity, better SNR, and faster measurements in a compact footprint. Collect more light with our f/1.3 input, keep more light with our patented high transmission VPH gratings & diffraction-limited optics, and detect more light with scientific-grade detectors. When tested side by side, our spectrometers consistently outperform larger, more expensive units. From sample coupling to wavelength range options, we give you more options to get the exact performance you need, powered by our free ENLIGHTEN™ spectroscopy software.

Call us to discuss your application!

WP VIS Spectrometer Features/Benefits:

  • Wavelength range is 400 - 800 nm
  • f/1.3 input to capture more light
  • High efficiency transmissive VPH gratings
  • >10x greater sensitivity & lower LOD
  • Low stray light and high signal to noise (SNR)
  • Fiber coupled or free space models
  • Compact, robust & configurable
  • Excellent thermal stability
  • OEM models available

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