Technical Notes


The Optics of Spectrometry: A Guide to Spectroscopy Gratings

Optical spectroscopy is the science of studying physical objects on the basis of light-matter interactions, representing all experimental methods that collect and investigate spectra. Read on.

What is Hyperspectral Imaging?

Hyperspectral imaging is an advanced imaging technique that incorporates spectroscopy to gather additional information about an object or geographical area. Learn how our gratings enable this.

How a Raman Grating Impacts Resolution

Finding the optimal choice of Raman grating for your specific application depends on a number of factors, including required resolution. Read on.

What You Need to Know About Laser Pulse Compression

Laser pulse compression is a well-known method to reduce the duration of a laser pulse in order to recompress the stretched pulse length. Read on.

5 Applications of Transmission Gratings

Diffraction gratings that operate in transmission can be used for many different applications. Here, we review the top 5 most popular applications we see, and how our VPH transmission gratings excel at each. Read on.

What Are the Types of Diffraction Gratings?

Diffraction gratings are optical components with periodic structures that operate on the principle of interference to split light into its component colors, but not all work the same way. Learn more about the different types.

OEM and Custom Gratings

Learn more about our design process for custom volume phase holographic (VPH) gratings, as well as our capabilities and typical applications served. Read the tech note

VPH Gratings: Flexibility in Design

VPH gratings offer a tremendous amount of flexibility to optimize performance for a specific application. In this tech note, we’ll discuss the our design technologies and the parameters we can adjust to meet your specific needs. Learn more

Grisms: Uses and Advantages

This mythically named optic offers the savvy optical engineer several handy tricks for bending light to their will, to save space or photons. When can a grating/ prism combination be beneficial in an optical design? See our tips

Advantages of VPH Gratings

Our VPH grating technology is at the heart of everything we do. Here, we share the many advantages of transmissive volume phase holographic gratings over reflective ruled gratings, and how we make the most of each one! Discover the top 10 advantages.

DIY Optical Coherence Tomography System Basics

Building a do-it-yourself optical coherence tomography setup? We’ll introduce you to some of the key principles and layout of an OCT system, plus share our expert tips on how to get the best performance from the OCT spectrometer portion of your design – whether you plan to build the spectrometer yourself or buy one. Learn more

What is Optical Coherence Tomography?

Optical coherence tomography is a form of non-invasive imaging testing that uses light waves to take cross-section images of biological material. Read on to learn more!

Optimizing OCT Spectrometer Performance

Does building your own OCT spectrometer really result in the clearest image? Creating a high-performance spectrometer for SD-OCT imaging requires a deep understanding of both OCT theory and spectrometer design. In this tech note, we’ll explain the most important aspects, then model premium off-the-shelf lenses vs custom-designed optics to see how performance compares. The difference in performance will surprise you…

Long-range imaging – 800 nm OCT goes ultra-deep

Imaging depth and resolution typically compete in OCT. See how we break the rules with a cost-effective, patented design for long-range OCT imaging at 800 nm, and how it can be used to fully probe the anterior chamer. See the images & roll-off data.

Spectral-Domain Optical Coherence Tomography for Ultra-High Resolution Ophthalmic Imaging

Optical coherence tomography, or OCT, is the method of choice for ophthalmologists looking to examine the structure of the eye, from cornea to retina, where standard imaging techniques reach their limits. Spectral-domain OCT is a unique subset of that technology. Learn more

How Does a Raman Spectrometer Work?

Raman spectroscopy can be used to authenticate materials or assess their quality, and even for medical diagnostics. But how does a Raman spectrometer work? Read on.

Reproducible Raman Measurements

OEM applications need consistent performance to deliver dependable answers. Learn how to achieve better than 99.5% unit-to-unit spectral agreement with a series of simple corrections in this tech note.

What is Raman Spectroscopy?

At Wasatch Photonics, we have deployed our extensive expertise in precision optics to the field of Raman spectroscopy. But what actually is it? Find out

Configuring 785 Raman for Your Application

Does your toolbox for 785 Raman have the versatility and sensitivity to take your application into new spaces? See how we bridge the worlds of compact and high-performance Raman with our flexible solutions in this tech note.

Spectroscopy: The Wasatch Advantage

We’ve designed our spectrometers to collect more light, keep more light, and detect more light. This results in much higher sensitivity, faster acquisition rates, and lower limit of detection. See the schematic and learn more.

Extending the Reach of Portable Spectroscopy

Reducing the size of your spectroscopy system doesn’t have to mean reducing its performance. In this tech note, we let our sensitivity, thermal stability, and reproducibility speak through the data. Ready to take the lid off? Read on.

Why Wasatch for Raman

Too often, a Raman spectrometer’s data sheet doesn’t tell you what you really want to know. Is it sensitive enough? Does it produce clean spectra? Is it robust enough for OEM use? While every application is unique, we can share some benchmark data to show you how we outperform the competition, and why. See the data.

Raman: Wavelength Matters

The right excitation wavelength makes all the difference in Raman spectroscopy. Learn how to choose your Raman excitation wavelength based on Raman excitation efficiency, sample sensitivity, spectral range & resolution, and minimizing fluorescence background. Let’s get started.

Raman: How sample coupling affects data quality

Spectrometer or system? Probe or integrated laser? How you interface with your Raman sample depends not only on whether you value convenience or configurability, but also on the data quality you require. In this tech tip, we’ll show you how to get more out of our many sample coupling & configuration options. See the data, and how our probes outperform the rest.