Ocean Optics - Inventor of the World's First Miniature Spectrometer
Ocean Optics - Inventor of the World's First Miniature Spectrometer

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Ocean Optics - Inventor of the World's First Miniature Spectrometer


USB4000 Miniature Fiber Optic Spectrometer

We’ve sold over 200,000 spectrometer channels for thousands of applications, and we've used that experience to make the most flexible, versatile and cost-effective spectrometer ever built. The USB4000 features a 3648-element Toshiba linear CCD array for increased signal-to-noise and enhanced electronics for controlling the spectrometer and accessories. The USB4000 is made-to-order per your optical bench selections -- including order-sorting filters and entrance slits sizes -- which are available as separate line items.

Pre-configured USB4000-UV-VIS & USB4000-VIS-NIR are in-stock and ready to ship!

World’s Most Popular Spectrometer

The USB4000 features a 16-bit A/D, four triggering options, a dark-level correction during temperature changes, and a 22-pin connector with eight user-programmable GPIOs. What’s more, the USB4000 interfaces to computers with Linux, Mac or Windows operating systems. The modular USB4000 is responsive from 200-1100 nm and can be configured with various Ocean Optics optical bench accessories, light sources and sampling optics to create application-specific systems for thousands of absorbance, reflection and emission applications.

Electronic Advancements

The USB4000 Spectrometer is distinguished by its enhanced electronics: 16-bit A/D resolution with auto nulling feature (an enhanced electrical dark-signal correction); EEPROM storage of calibration coefficients for simple spectrometer start-up; 8 programmable GPIO signals for controlling peripheral devices; and an electronic shutter for spectrometer integration times as fast as 3.8 milliseconds -- a handy feature to prevent detector saturation.

We also offer triggering functions with the USB4000 that provide accurate timing and synchronization between your spectrometer and other devices. Three low-jitter trigger modes and normal (free-running spectral acquisition) operating modes are now possible. The Shutter Mode feature is especially useful for integration times below 3.8 milliseconds. Read more (PDF).

Streamlined Start-up Software & Hot Swapping

The USB4000 interfaces to a computer via USB 2.0 or RS-232 serial port. Data unique to each spectrometer is programmed into a memory chip on the USB4000; OceanView Spectroscopy Operating Software reads these values for easy setup and hot swapping among computers, whether they run on Linux, Mac or Windows operating systems. When connected to a computer via USB, the USB4000 draws its power from the computer.

Optical Bench Options

At Ocean Optics, we understand that your work is unique and that you want a spectrometer to fit your specific needs. What makes the USB4000 Spectrometer so special are the options that allow you to configure the bench for your application. Choose USB4000 Optical Bench Options such as entrance aperture size, detector accessories, filters, gratings and more. Our Application Scientists will help you determine which configuration will best work for you.

Detector Options

The USB4000 uses the Toshiba TCD1304AP 3648-element linear CCD-array detector. To properly configure a USB4000 Spectrometer for your application, you'll need to specify one of the Four Detector Options offered; all four options include the Toshiba detector but with different coatings and windows. Your Application Scientist can help you determine which detector options will best work for you.

Installation and Operation Manual

Our USB4000 Manual provides you with instructions for setting up, calibrating and performing experiments with your USB4000 spectrometer.

Sampling Accessories

When you purchase a USB4000, you can also choose from Ocean Optics' complete line of spectroscopic accessories. Most accessories have SMA 905 connectors for application flexibility. Changing the sampling system is as easy as unscrewing a connector and adding new components or accessories, such as USB4000 direct-attach accessories, and additional light sources, sampling holders, filter holders, flow cells, fiber optic probes and sensors, collimating lenses, attenuators, diffuse reflectance standards, integrating spheres and our extensive line of optical fibers.



Dimensions: 89.1 mm x 63.3 mm x 34.4 mm
Weight: 190 grams
Detector Specifications


Toshiba TCD1304AP Linear CCD array

Detector range: 200-1100 nm


3648 pixels

Pixel size:

8 μm x 200 μm

Pixel well depth:

100,000 electrons

Signal-to-noise ratio: 300:1 (at full signal)
A/D resolution: 16 bit
Dark noise: 50 RMS counts
Corrected linearity: >99%
Optical Bench
Design: f/4, Asymmetrical crossed Czerny-Turner
Focal length: 42 mm input; 68 mm output
Entrance aperture: 5, 10, 25, 50, 100 or 200 µm wide slits or fiber (no slit)
Grating options: 14 different grating options, UV through Shortwave NIR
HC-1 grating option: No
Detector collection lens option: Yes, L4
DET4 filter options: DET4-200-850; DET4-350-1000
Other bench filter options: Longpass OF-1 filters
Collimating and focusing mirrors: Standard or SAG+UPG
UV enhanced window: Yes, UV4
Fiber optic connector: SMA 905 to 0.22 numerical aperture single-strand optical fiber
Wavelength range: Grating dependent
Optical resolution: ~0.1-10.0 nm FWHM (grating dependent)
Signal-to-noise ratio: 300:1 (at full signal)
A/D resolution: 16 bit
Dark noise: 50 RMS counts
Integration time: 3.8 ms - 10 seconds
Dynamic range: 3.4 x 106 (system), 1300:1 for a single acquisition
Stray light: <0.05% at 600 nm; 0.10% at 435 nm
Power consumption: 250 mA @ 5 VDC
Data transfer speed: Full spectrum to memory every 4 ms with USB 2.0 port
Inputs/Outputs: Yes, 8 onboard digital user-programmable GPIOs
Analog channels: No
Auto nulling: Yes
Breakout box compatible: Yes, with the USB-ADP-BB adapter
Trigger modes: 4 modes
Strobe functions: Yes
Connector: 22-pin connector
Operating systems: Windows, Linux, OS X
Computer interfaces: USB 2.0 @ 480 Mbps (USB1.1 compatible); RS-232 (2-wire) @ 115.2 K baud
Peripheral interfaces: SPI (3-wire); I2C inter-integrated circuit

Serial port operation tips: When using the serial port, the USB4000 requires a single 5-volt power supply (not included).

Contact an
Ocean Optics 
Applications Scientist


Download the Product Sheet

Optical Bench Options

Predicted Ranges and Resolutions

Convenient Wavelength Calibration



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