Request Quote

Gold Standard Gratings for Hyperspectral Imaging

High efficiency, low abberations

VPH gratings are widely considered the gold standard for high-performance HSI systems, particularly for industrial and remote sensing applications, since transmissive VPH gratings offer the optical designer many advantages. The Wasatch VPH gratings are more efficient and scatter much less than reflective ruled gratings whilst being more robust to handling vs surface relief gratings meaning they enable transmissive spectral instruments that are smaller in size, lower aberration, and easier to align. Choose from our range of stock gratings or contact us to discuss your OEM needs.

Features & Benefits

  • •

    Patented broad bandwidth grating designs

  • •

    Exceptional 1st order diffraction efficiency for greater sensitivity and faster imaging rates

  • •

    Low polarization sensitivity, uniform efficiency

  • •

    Near-zero ghosting & scatter – less stray light

  • •

    Low wavefront error for clearer images

  • •

    Robust design for easy cleaning & handling

  • •

    Ideal for NIR imaging to 2500 nm

Wasatch Photonics VPH gratings deliver superior efficiency and low-scatter performance for high-precision transmissive spectroscopy.

Typical Hyperspectral Imaging Grating Specifications

WP-250/1250-xx
WP-600/600-xx
WP-1800/532-xx
WP-600/1550-xx
Nominal Wavelength
900 – 1800 nm
450 – 750 nm
450 – 650 nm
1300 – 1800 nm
Efficiency (ave pol)
≥ 70% at 1310 nm
≥ 80% at 633 nm
≥ 88% at 532 nm
≥ 90% at 1550 nm
Spatial Frequency
250 ± 0.5 lines/mm
600 ± 0.5 lines/mm
600 ± 0.5 lines/mm
600 ± 0.5 lines/mm
Angle of Incidence
9° @ 1250 nm
10.4° @ 600 nm
28.6° @ 532 nm
27.7° @ 1550 nm
Sizes Available (-xx)
30 mm Ø x 3.0 mm
25.4 mm Ø x 3.0 mm
50.8 mm Ø x 6.0 mm
25.4 mm Ø x 3.0 mm
50.8 mm Ø x 6.0 mm
25.4 mm Ø x 3.0 mm
50.8 mm Ø x 6.0 mm
Wavefront Distortion
Standard: < λ/5 rms | Enhanced: < λ/10 rms (@ 632.8 nm)
Surface Quality
60-40 scratch-dig
AR Coating
Standard: R < 1.0% | Enhanced: R < 0.5% (over bandwidth)

Nominal Wavelength

900 – 1800 nm
Efficiency (ave pol)
≥ 70% at 1310 nm

Spatial Frequency

250 ± 0.5 lines/mm

Angle of Incidence

9° @ 1250 nm

Sizes Available (-xx)

30 mm Ø x 3.0 mm

Wavefront Distortion

Standard: < λ/5 rms | Enhanced: < λ/10 rms (@ 632.8 nm)
Surface Quality
60-40 scratch-dig

AR Coating

Standard: R < 1.0% | Enhanced: R < 0.5% (over bandwidth)

Nominal Wavelength

450 – 750 nm
Efficiency (ave pol)
≥ 80% at 633 nm

Spatial Frequency

600 ± 0.5 lines/mm

Angle of Incidence

10.4° @ 600 nm

Sizes Available (-xx)

25.4 mm Ø x 3.0 mm
50.8 mm Ø x 6.0 mm

Wavefront Distortion

Standard: < λ/5 rms | Enhanced: < λ/10 rms (@ 632.8 nm)
Surface Quality
60-40 scratch-dig

AR Coating

Standard: R < 1.0% | Enhanced: R < 0.5% (over bandwidth)

Nominal Wavelength

450 – 650 nm
Efficiency (ave pol)
≥ 88% at 532 nm

Spatial Frequency

600 ± 0.5 lines/mm

Angle of Incidence

28.6° @ 532 nm

Sizes Available (-xx)

25.4 mm Ø x 3.0 mm
50.8 mm Ø x 6.0 mm

Wavefront Distortion

Standard: < λ/5 rms | Enhanced: < λ/10 rms (@ 632.8 nm)
Surface Quality
60-40 scratch-dig

AR Coating

Standard: R < 1.0% | Enhanced: R < 0.5% (over bandwidth)

Nominal Wavelength

1300 – 1800 nm
Efficiency (ave pol)
≥ 90% at 1550 nm

Spatial Frequency

600 ± 0.5 lines/mm

Angle of Incidence

27.7° @ 1550 nm

Sizes Available (-xx)

25.4 mm Ø x 3.0 mm
50.8 mm Ø x 6.0 mm

Wavefront Distortion

Standard: < λ/5 rms | Enhanced: < λ/10 rms (@ 632.8 nm)
Surface Quality
60-40 scratch-dig

AR Coating

Standard: R < 1.0% | Enhanced: R < 0.5% (over bandwidth)

Design Graphs

Ready to Start Your Project?

Not sure where to start? Use our grating calculator, submit your parameters or custom design, and let our experts handle the rest.

Custom Grating Design

Contact us to start your custom grating design

Grating Calculator

Explore our Grating Calculator Tool
Back to Top
Main Menu

Misty Johnson

Misty Johnson is responsible for taking care of our grating customers at the Logan, Utah, facility. She has been a member of the Wasatch Photonics team since 2009. By understanding her customers’ needs and goals, as well as the current grating market, Misty is able to provide a superior level of customer support. As Account Manager, she acts as a liaison between customers and Wasatch Photonics’ manufacturing department making sure that the lines of communication are always open.

Customer support is an integral part of Wasatch Photonics commitment to customers. Whether you are in the market to purchase a single grating, inquiring as a distributor, or purchasing large volume, Misty will guide you seamlessly through the custom design process. Misty strives to build trust and strong long term relationships with Wasatch Photonics customers. She brings 20 years’ experience as customer support manager from a number of manufacturing and service companies.