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Optical Spectrometer

All Measurement Equipment, Spectrometers, Spectroscopy, and Spectrometer Accessories

Product Code G2001B2
Price $3,000 ex. VAT

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Low price USB optical spectrometer for UV-Vis spectroscopy

Measure the spectrum of light over a wide spectral range, from 320 nm to 1050 nm

Ossila Optical Spectrometer
The Ossila Optical Spectrometer: compact but powerful

The Ossila Optical Spectrometer is a fast, reliable, and compact USB optical spectrometer which brings affordable UV-Vis-NIR (320 nm to 1050 nm) spectroscopy to research scientists around the world. Featuring powerful electronics, precision optics and intuitive software, the device is perfect for a range of optical experiments.

Buy as an independent miniature spectrometer or as a part of our complete optical spectroscopy bundle, which comes with everything you need to get started.

The Ossila spectrometer is built to simplify taking general spectroscopy measurements such as:

  • Reflection and transmission measurements
  • Scattering experiments
  • Absorption measurements
  • Luminescence measurements such as photoluminesence and electroluminescence

With our free spectroscopy software, you can begin taking optical measurements straight away. Just plug the optical spectrometer into a PC to get started.

For advanced users, the Ossila Optical Spectrometer is fully programmable, and has a wide compatibility with other optical equipment. The Ossila Optical Spectrometer would fit nicely into most existing UV-Vis-NIR optical spectroscopy setups; a simple command library and internal and external triggers make it easy to fully integrate the device into your workflow.

Complete Optical Spectroscopy Bundle

Complete Optical Spectroscopy Bundle
  • Unbeatable Value
  • Includes Spectrometer and Accessories

Worldwide Delivery £2400

Spectrometer accessories including optical breadboard, two-port transmission holder and four-port transmission holder also available

What is an optical spectrometer?

In general, a spectrometer is a device that separates spectral components of a continuous characteristic such as electromagnetism so that it can be measured. An optical spectrometer takes a beam of light and separates it into its constituent wavelengths using a dispersive element such as a grating or prism, and then measures the relative intensities of these wavelengths using an optical sensing element. Optical spectrometers work primarily in the visible light region of the electromagnetic spectrum, extending into the UV and IR regions, and are used to perform optical spectroscopy.

Optical spectroscopy uses light to probe the properties of materials or structures. By studying the wavelength and intensity of light that is emitted, transmitted, reflected or absorbed by a material or structure, various properties of the sample can be determined. For example, the concentration of molecules in solution can be determined by measuring the light absorbed by the solution, or the thickness of films can be calculated by the reflected light.

Why Choose the Ossila Optical Spectrometer

Free compatible software

Free software



Easily Programmable

Easily programmable

Powerful Electronics

Powerful electronics

USB powered

USB powered



Low Cost

Low price point

Easy to Use

Easy to use

Key Features

Wide UV-Vis-NIR spectral range

UV-Vis-NIR Dynamic Spectral Range

The Ossila Optical Spectrometer measures the entire visible light spectrum, from the UV-A band to the near infrared (320 nm to 1050 nm).

The optical spectrometer can therefore be used to study a wide range of material systems including photovoltaic, solar cell, OLED, biological, and 2D materials. To minimise the impact of higher diffraction grating orders on the spectra, a filter is included to partially cover the detector when performing spectroscopy in the visible range.

Powerful electronics

Fast Acquisition Speeds

A powerful Arm cortex M4 processor works with a low-noise, high-speed 16-bit, 500 kSPS analog-to-digital converter (ADC) to provide fast and accurate operation, all powered through a 'plug-and-play' USB type-C connection.

Thanks to its powerful electronics, the optical spectrometer is capable of transferring over 100 frames-per-second to the host computer via the USB cable when running in internal trigger mode. Alongside the USB power and data connector, a six port I/O expansion header allows for easy integration with other 5V equipment.

Free optical spectrometer software

Free Software or Completely Programmable

The spectrometer system includes powerful spectroscopy software to help you start measuring quickly. Intensity, transmission/reflection and absorbance measurements are all available. Additional features include spectral averaging and accumulation, autosaving, peak detection, offset and gain adjustment, and more.

The system can be integrated with other hardware using the simple serial command interface, compatible with most programming languages. A full list of commands is included in the product manual along with a number of examples in Python to help you get started.

USB optical spectrometer enclosure and case

Compact and Modular Design

The clever design of the Ossila Optical Spectrometer closely integrates the optical elements and internal electronics into an extremely small foot print that can be fixed onto an optical bench. The result is a lightweight, compact but powerful UV-Vis-NIR spectrometer.

The Ossila Optical Spectrometer has a high strength enclosure, and is capable of withstanding heavy daily use in the lab. The optional spectrometer case (pictured), included in the complete optical spectroscopy bundle and available to buy separately, also allows it to be bolted to standard optical tables or breadboard plates.

Internal and external trigger spectrometer modes

Internal and External Trigger Modes

Use the optical spectrometer in free-running mode, or integrate with other systems using the external trigger input. The unique rolling integration mode, which begins acquisition with a 5V rising edge on the rolling integration port and ends it when the voltage at the port returns to 0V, allows the integration time to be controlled dynamically by external trigger signals.

The optical spectrometer includes an output to synchronise acquisition with an external shutter, and also has two programmable general purpose output pins. In total, it features six I/O ports, including a ground port.

Internal and external trigger spectrometer modes

USB Powered, Easy-to-Use

Power the Ossila Optical Spectrometer via the USB port. Designed with efficient electronics that require little power to operate, our optical spectrometer can be easily powered by the included USB-C cable without the need for an additional dedicated power supply. This makes our optical spectrometer portable and versatile.

You can get up and running on our optical spectrometer quickly and easily with either your computer or laptop - simply plug in via the USB port and begin measuring.


I have been using the Ossila Optical Spectrometer in my research to measure absorption, transmission, and reflectivity. I highly recommend it to anyone who is looking for a cheap, fast, reliable and easy-to-use spectrometer for their optical experiments.

Kyriacos Georgiou, PhD, University of Cyprus

Optical spectrometer protective case
A protective spectrometer case can also be purchased which enables the device to be secured to an optical bench
Optical transmission holder with optical spectrometer
The spectroscopy transmission holder (sold separately) holds your substrate or film in place for absorption or transmission measurements

Spectrometers and Spectroscopy

  • White Light Source
  • Transmission Holder
  • Breadboard
  • More

Affordable Spectroscopy

Support and Articles

Spectrometer vs Spectrophotometer

Spectrometer vs Spectrophotometer

Spectrometers and spectrophotometers are two commonly used instruments in scientific research, particularly in the field of spectroscopy.

Choosing a Sample Holder for Spectroscopy

Choosing a Sample Holder for Spectroscopy

One question to consider is should you measure your samples as a thin film or in solution? This decision will depend on the type of measurement you are taking, your sample and its desired application.

Light Sources for Spectroscopy

Light Sources for Spectroscopy

Spectroscopy can be performed using a range of different light sources. These can typically be categorised as being either monochromatic or broadband.

UV-Vis spectroscopy troubleshooting

UV-Vis Spectroscopy Troubleshooting

It can be incredibly frustrating if you encounter a problem while performing UV-Vis spectroscopy, and usually causes an unnecessary delay.

UV-Vis spectroscopy errors

UV-Vis Spectroscopy Errors

Like any analytical technique, spectrometers are subject to error, including dark noise, stray light, and spectral bandwidth.

Python for Spectroscopy, Spectra Data Visualization

Python for Spectroscopy: Spectra Data Visualization

Optical spectroscopy data can be processed faster and more consistently using programming tools such as Python. This is a step-by-step guide of how researchers process multiple spectra that were taken using the Ossila Optical Spectrometer. The code in this guide is designed for the Ossila Optical Spectrometer.

Fluorescence and Phosphorescence

Fluorescence and Phosphorescence

Both fluorescence and phosphorescence are types of photoluminescence. Photoluminescence refers to radiative emissions where the absorbance of a photon is followed by the emission of a lower energy photon. The main empirical difference between fluorescence and phosphorescence is the time in between absorbance and the emission of photons.

Thin Film Spectroscopy: Setup and Measurement

Thin Film Spectroscopy: Setup and Measurement

This article contains some advice from our researchers that should help you get started taking optical spectroscopy measurements of thin films.

Measuring Thin Film Fluorescence

Measuring Thin Film Fluorescence

To measure the fluorescence of a thin film, you will need an optical spectrometer, a fixed sample holder and a high energy light source (such as a UV laser or the Ossila UV light source). We also recommend using optical fiber cables between modular elements to reduce the attenuation of your signal.



Electroluminescence (EL) is the generation of light through the radiative recombination of holes and electrons which have been injected into the material from cathode and anode contacts. The charge carriers are injected into the material due to an applied bias over the cathode and anode. These cathode and anodes are orientated opposite each other.

Spectroscopy For Organic Electronics

Spectroscopy For Organic Electronics

The different types of spectroscopy can be categorised by either the application it is used for or by type of radiative energy employed. The application of spectroscopic methods in organic (carbon-based) chemistry and organic electronics is known as organic spectroscopy.

Absorption Spectroscopy

Absorption Spectroscopy

In absorption spectroscopy, the intensity of light absorbed by a sample is measured as a function of wavelength. This can provide important information about the electronic structure of an atom or molecule.

Photoluminescence Spectroscopy

Photoluminescence Spectroscopy

Photoluminescence is luminescence resulting from photoexcitation. In other words, photoluminescence is when a material emits light following the absorption of energy from incident light from another light source.

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Spectrometer User Manual

Ossila Optical Spectrometer User Manual

Ossila's USB powered optical spectrometer has been designed to simplify the optical characterisation of thin films, solutions, nanocrystals, photonic structures, and more. A state-of-the-art enclosure combines with powerful electronics to deliver a fast, reliable, and cost-effective device.

Software and Drivers

Software and Drivers

The latest software and drivers for Ossila equipment, available to download for free.


All Spectroscopy Resources

View all spectroscopy resoruces



Dimensions 78 mm x 78 mm x 38 mm (D x W x H)
Weight 150 g
Wavelength range 320 nm - 1050 nm
Grating blaze wavelength 500 nm
Resolution (FWHM) 2.5 nm
Optical input SMA 905 fibre or free space
Entrance slit width 25 um
Connection type USB type-C
Communication protocol Serial-over-USB
Dark noise* < 50 counts
Signal-to-noise ratio > 500:1
Detector type / pixels CCD / 1600
Analog-to-digital converter 16-bit, 500 kSPS
Data transfer speed* Up to 100 fps (PC dependant)
Stray light < 0.2 %

*measured at 50 us integration time

What does the signal-to-noise ratio mean?

In order for a signal to be useful, it has to be significantly higher than the noise level. Therefore, an important property of spectrometers is the signal-to-noise ratio (SNR or S/N). This is a measure of the sensitivity of the spectrometer and compares the intensity of the signal, i.e. the spectral feature(s) you are looking at, to the intensity of the background noise.

SNR is often defined as the maximum signal height divided by the root mean square (RMS) of the noise in the background signal. It can be expressed as a ratio (e.g. 500:1) or in decibels (dB). If the ratio is greater than 1:1 (0 dB), the signal is greater than the noise.

The Ossila Optical Spectrometer has a signal-to-noise ratio of > 500:1.

Price Information

Complete Optical Spectroscopy Bundle £2400
Ossila Optical Spectrometer £1250
Ossila Spectroscopy Software FREE

The Ossila Optical Spectrometer is eligible for FREE worldwide shipping and is covered by our two year warranty as standard.

Spectroscopy Software

The Ossila Optical Spectrometer comes with powerful spectroscopy software which makes it quick and easy to control the device and start collecting data. Take background spectra and measure intensity, transmission / reflection and absorbance measurements in just a few clicks. The spectroscopy software also features spectral averaging and accumulation, peak detection, offset and gain adjustment, and more - all via a straightforward user interface.

Software updates are provided at no extra charge and are available to download from our website.

Spectrometer software showing white light source spectrum Spectrometer software in dark mode
The spectrometer software showing the spectrum for the Ossila Broadband White Light Source (hover/tap to see dark mode)

Software Features

No programming required

The Ossila Optical Spectrometer can be controlled via the spectroscopy software. Setting up a spectroscopy experiment and taking optical measurements has never been easier. No programming knowledge required.

Intuitive and easy-to-use

The Ossila spectroscopy software has been designed to be intuitive and easy to use. Spectra workspaces allow you to take multiple spectra and view important numerical data at a glance. Common features and settings can be accessed via the quick access bar at the top of the screen.

Multiple measurement modes

The Ossila Optical Spectrometer spectroscopy software makes it straight-forward to take measurements in five different measurement modes: intensity, intensity (background corrected), intensity (sensitivity corrected), transmission / reflection, and absorption.

Optional serial command interface

Serial commands can be sent to the optical spectrometer via the spectroscopy software. Alternatively, the spectrometer can be controlled via serial commands sent from most programming languages.

Using the supplied optical spectroscopy software and a suitable optical set up, the Ossila Optical Spectrometer can measure transmission, reflectivity, scattering, absorption, and luminescence (including photoluminescence, fluorescence, phosphorescence, and electroluminescence) over a wavelength range of 320 nm to 1050 nm.

These methods have a wide range of applications across a number of different fields. They can be used to characterise LEDs and lasers, measure the efficiency of (anti)reflection coatings at various wavelengths, probe absorbing materials to reveal information about their atomic structures, and detect fluorescence. In photovoltaics, the Ossila Optical Spectrometer can be used to measure both the source spectrum (i.e. the solar spectrum) and the absorption spectrum of the device so that the two can be compared.

Software Requirements

Operating Systems Windows 10
CPU Dual Core 2.0 GHz
Available Hard Drive Space 300 MB
Monitor Resolution 1280 x 960
Connectivity USB 2.0

Software Installation

To install the spectroscopy PC software, download the latest version from our website or insert the supplied USB memory stick into your computer and run the "Ossila-Spectrometer-Installer-vX-X-X-X.exe" file. Once installed, plug the optical spectrometer in via the supplied USB type-A to USB type-C cable. When launched, the software will automatically detect any Ossila Optical Spectrometers connected to the PC.

Command Library

The Ossila Optical Spectrometer can be controlled using a simple serial command library; the device will appear as a COM port when connected to a PC. Commands can be sent via the command window in the spectroscopy software or via most programming languages. A full list of commands and example code is included in the user manual.

USB spectrometer with free software
The USB powered Ossila Optical Spectrometer comes with free PC software

To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, military, pharmaceuticals, cosmetics, food, or commercial applications.

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