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USB4000 Optical Bench Options

Catalog Ocean Optics - 18485 7

L4 Detector Collection Lens

This cylindrical lens, made in-house to ensure aberration-free performance, is fixed to the detector’s window to focus the light from the tall slit onto the shorter detector elements. It increases light-collection efficiency and reduces stray light. It also is useful in a configuration with a large-diameter fiber for low light-level applications. At right is a detector with the L4 lens. L4 Detector Collection Lens: $150
Toshiba TCD1304APDetector with L4 DetectorCollection Lens (above) and without (below).

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Detector: 3648-element Linear CCD Array

In each USB4000, we install the Toshiba TCD1304APlinear CCD array detector. In the USB2000, the USB4000’s predecessor, we used the Sony ILX511detector. Both are linear silicon CCD arrays, with aneffective range of 200-1100 nm, and with the same dynamic range (1300:1). There are some differences between the Toshiba detectorand the Sony detector. For example, since the Toshiba’s pixels are only 8 µm wide instead of 14 µm wide, the sensitivity for a Toshiba pixel seems to be ~60% (8 µm/14 µm) that of a Sony pixel (see graph at right).However, on a per-unit area basis, the sensitivity is aboutthe same since the Toshiba has 3648 pixels compared with the Sony’s 2048; the total signal is the same.Because the Toshiba detector has an electronic shutter, you can almostnever have too much light; the shutter prevents thedetector from saturating.

Detector Sensitivity Comparison

Spectrometers 40003000 2000 10000 Sony 2048-element ILX511 DetectorToshiba 3648-element TCD1304APDetector INTENSITY(COUNTS)

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200 300 400 500 600 700 800 900

Detector with OFLV Filter

STARTINGWAVELENGTH (nm) Our OFLV Variable Longpass Order-sorting Filters areapplied to the detector’s window to eliminate second-and third-order effects. We use patented coating technology to apply the filter onto the substrate. In fact, we are the only miniature spectrometer manufacturer tooffer “clean” first-order spectra.
Toshiba TCD1304AP Specifications Detector:Toshiba TCD1304APlinear CCD arrayDetector range:200-1100 nmPixels:3648 pixelsPixel size:8 µm x 200 µm Pixel well depth:~100,000 electrons Sensitivity:400 nm: 130 photons/count, 600 nm: 60 photons/count Maximum pixel rate:Rate at which pixels are digitized is 1 MHz

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Detector with UV4 Detector Window Upgrade

When you specify a detector with the UV4 DetectorWindow Upgrade, we replace the detector’s standard BK7 window with a quartz window to enhance the spectrometer‘s performance from 200-340 nm.
DetectorDescriptionPrice DET4-VISToshiba TCD1304APDetector installed into a USB4000 User-Configured Spectrometer; best for systemsFreewith wavelength ranges above 400 nmDET4-UVToshiba TCD1304APDetector with UV4 Detector Window Upgrade installed into a USB4000 User-$150Configured Spectrometer; best for systems with wavelength ranges in the UVDET4-350-1000Toshiba TCD1304APDetector with OFLV-350-1000 Variable Longpass Order-sorting Filter installed into a$150USB4000 User-Configured Spectrometer; best when using Grating #2, #3 or #4DET4-200-850Toshiba TCD1304APDetector with UV4 Detector Window Upgrade and OFLV-200-850 Variable Longpass$300Order-sorting Filter installed into a USB4000 Spectrometer; best when using Grating #1 or #2 Tel:727.733.2447 • Email:Info@OceanOptics.com17

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