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


HR4000 High-Resolution Spectrometer

This high-resolution spectrometer is a novel combination of optics and electronics that is ideal for applications such as characterizing lasers, measuring gas absorbance, and determining atomic emission lines.

0.02 nm Optical Resolution (FWHM) Possible

The HR4000 Spectrometer is a versatile high-resolution spectrometer. The HR4000 has a 3648-element CCD-array detector from Toshiba that enables optical resolution as precise as 0.02 nm (FWHM). The HR4000 is responsive from 200-1100 nm, but the specific range and resolution depend on your grating and entrance slit choices. This novel combination of optics and electronics is ideal for applications such as characterizing lasers, measuring gas absorbance, and determining atomic emission lines.

Electronic Shutter Prevents Saturation

Integration Time is a setting in our software that is specified by the user. It’s analogous to the shutter speed of a camera: the value specified for the integration time is the amount of time the detector “looks” at the incoming photons. Because the Toshiba detector has an electronic shutter, you can specify, via software, minimum integration times as short as 3.8 milliseconds, which allow you to measure transient events like laser pulses (for even faster integration times using the External Hardware Trigger Mode, see our HR2000+ Spectrometer). Also, the ability to integrate the spectrometer for short durations eliminates saturation problems that can occur in high light-level applications such as laser analysis.

Onboard Microcontroller

The HR4000’s onboard microcontroller provides you with considerable flexibility in controlling the spectrometer and accessories. Through a 30-pin connector, you can implement all operating parameters in the software: control light sources, create processes, and retrieve information on external objects. You have access to 10 user-programmable digital inputs/outputs for interfacing to other equipment; one analog input and one analog output; and a pulse generator for triggering other devices. (Programming the GPIOs requires SpectraSuite, OmniDriver or one of our other device drivers.)

Multiple Interface Options

The HR4000 interfaces to a computer via USB 2.0 or RS-232 serial port. When using the serial port, the HR4000 requires a single 5-volt power supply (not included). Data unique to each spectrometer are programmed into a memory chip on the HR4000; our OceanView software reads these values for easy setup and hot swapping among computers, whether they run on Linux, Mac or Windows operating systems.

Optical Bench Options

With the HR4000 Spectrometer, you can configure the bench for your application. Choose HR4000 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.

Installation and Operation Manual

Our HR4000 Manual provides you with instructions for setting up, calibrating and performing experiments with your HR4000 spectrometer.

Breakout Box Accessory

The HR4-BREAKOUT is a passive module that provides access to a variety of functions found in the HR4000. The BREAKOUT BOX allows multiple interfaces to a spectrometer such as: external triggering, GPIO, light sources, RS-232 interface and analog input/output.

Ordering Information

Item Description
HR4000 HR4000 User-configured Spectrometer. User to specify an HR4000 Detector (see 3 detector options) and HR400 Spectrometer Optical Bench Options
HR4-BREAKOUT Breakout Box with easy access to HR4000 Functions
OceanView OceanView Spectroscopy Operating Software



Dimensions: 148.6 mm x 104.8 mm x 45.1 mm
Weight: 570 grams


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

Optical Bench
Design: f/4, Symmetrical crossed Czerny-Turner
Focal length: 101.6 mm input and output
Entrance aperture: 5, 10, 25, 50, 100 or 200 µm wide slits or fiber (no slit)
Grating options: Multiple grating options, UV through Shortwave NIR
HC-1 grating option: provides 200-1050 nm range (best efficiency)
Detector collection lens option: Yes, L4
OFLV filter options: OFLV-200-1100
Other bench filter options: Longpass OF-1 filters
Collimating and focusing mirrors: Standard or SAG+UPG-HR
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: ~0.02-8.4 nm FWHM
Signal-to-noise ratio: 300:1 (at full signal)
A/D resolution: 14 bit
Dark noise: 12 RMS counts
Dynamic range: 3.4 x 106 (system); 1300:1 for a single acquisition
Integration time: 3.8 ms to 10 seconds
Stray light: <0.05% at 600 nm; <0.10% at 435 nm
Corrected linearity: >99%
Power consumption: 450 mA @ 5 VDC
Data transfer speed: Full scans to memory every 4 ms with USB 2.0 port
Inputs/Outputs: Yes, 10 onboard digital user-programmable GPIOs
Analog channels: One 13-bit analog input; one 9-bit analog output
Auto nulling: No
Breakout box compatibility: Yes, HR4-BREAKOUT
Trigger modes: 4 modes
Strobe functions: Yes
Gated delay feature: No
Connector: 30-pin connector
Operating systems: Windows 98/Me/2000/XP, Mac OS X and Linux with USB port; Any 32-bit Windows OS with serial port
Computer interfaces: USB 2.0 @ 480 Mbps; RS-232 (2-wire) @ 115.2 K baud
Peripheral interfaces: SPI (3-wire); I2C inter-integrated circuit


Contact an Ocean Optics Applications Scientist


Optical Bench Options

Predicted Ranges and Resolutions

Convenient Wavelength Calibration



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