HR4000 High-resolution Spectrometer

0.02 nm Optical Resolution (FWHM) Possible

The HR4000 Spectrometer is our next-generation 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 (see pages 22-24 for options). This novel combination of optics and electronics is ideal for applications such as characterizing industrial 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. 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.

Sample Spectrum of Laser

1000800 600 400 2000 AMPLITUDE (Counts) Spectrometers 800 805 810 815 820 One popular applicationfor the HR4000 is laser analysis. Atypical setup may look something like this: a laser’s beam is directed into the FOIS-1 Integrating sphere. An optical fiber collects the light and sends it to the HR4000. WAVELENGTH (nm) We acquired this spectrum of a 810-nm Multimode Industrial diode laser withan HR4000, Grating H11 and a 5-µm slit. Specifications PHYSICALDimensions:148.6 mm x 104.8 mm x 45.1 mm Weight:570 gDETECTORDetector:Toshiba TCD1304APlinear CCD array (page 24)Detector range:200-1100 nmPixels:3648 pixels, pixel size of 8 µm x 200 µm Pixel well depth:~100,000 electrons Sensitivity:130 photons/count at 400 nm; 60 photons/count at 600 nmOPTICALBENCHDesign:f/4, Symmetrical crossed Czerny-TurnerFocal length:101.6 mminput, 101.6 mm outputEntrance aperture:5, 10, 25, 50, 100 or 200 µm wide slits(page 22) or fiber Grating options:14 gratings, UV through Shortwave NIR (page 23) Order-sorting filters:longpass OF-1 filters and OFLV-200-1100 (page 24) Fiber optic connector manufacturer:SMA905 to 0.22 numerical aperture single-strand fiberSPECTROSCOPICWavelength range:Grating dependent Optical resolution:~0.02-8.4 nm FWHM Signal-to-noise ratio:300:1 (at full signal) Dark noise:12 RMS counts Dynamic range:2 x 10

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. See pages 80-82 for details.) HR4000: $3,999
8 (system); 1300:1 for a single acquisitionIntegration time:3.8 ms to 10 secondsELECTRONICSPower consumption:450 mA@ 5 VDC Data transfer speed:Full spectrum to memory every 4 ms with USB 2.0 port,18 ms with USB 1.1 portInputs/Outputs:Yes, 10 onboard digital user-programmable GPIOs Analog channels:One 13-bit analog input, One 9-bit analog outputCOMPUTEROperating systems:Windows 98/Me/2000/XP, Mac OS X and Linux withUSB port; any 32-bit Windows OS using serial port*Computer interfaces:USB 2.0 @ 480 Mbps; RS-232 (2-wire) @ 115.2 K baud Peripheral interfaces:SPI (3-Wire), I

Plug-and-Play USB Operation

The HR4000 interfaces to a PC, PLC or other embedded controllers 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 spectrometer operating software reads these values for easy setup and hot swapping among PCs.
2 C inter-integrated circuit * You cannot use SpectraSuite if you’re interfacing an HR4000 to a PC via RS-232. ACommand Set is included for writing your own software. Tel:727.733.2447 • Email:Info@OceanOptics.com21

oo oo