HR Optical Bench Options
Hover over the numbers on the image for more info.
SMA 905 Connector
Light from a fiber enters the optical bench through an SMA 905 connector.
Fixed Entrance Slit
Light passes through the slit, which acts as the entrance aperture.
Longpass Absorbance Filter
An optional filter used to limit the bandwidth of light entering the spectrometer or to balance color.
Light reflects from this mirror as a collimated beam toward the grating.
Gratings are fixed in place at the time of spectrometer assembly.
This mirror focuses first-order spectra on the detector plane.
Detector Collection Lens
Optional cylindrical lens increases light collection efficiency.
Linear CCD arrays available in 2048- and 3648-element versions.
OFLV Variable Longpass Order Sorting Filter
Filters block second- and third-order light from specific detector elements.
Optical bench option for applications <340 nm.
Light from a fiber enters the optical bench through the SMA 905 connector. The SMA 905 bulkhead provides a precise locus for the end of the optical fiber, fixed slit, absorbing filter and fiber clad mode aperture.
Light passes through the installed slit, which acts as the entrance aperture. Slits come in various widths from 5 µm to 200 µm. The slit is fixed in the SMA 905 bulkhead to sit against the end of a fiber.
If selected, an absorbance filter is installed between the slit and the clad mode aperture in the SMA 905 bulkhead. The filter is used to block second- and third-order effects or to balance color.
The collimating mirror is matched to the 0.22 numerical aperture of our optical fiber. Light reflects from this mirror, as a collimated beam, toward the grating. You can opt to install a standard mirror or a UV absorbing SAG+ mirror.
We install the grating on a platform that we then rotate to select the starting wavelength you’ve specified. Then we permanently fix the grating in place to eliminate mechanical shifts or drift.
This mirror focuses first-order spectra on the detector plane. Both the collimating and focusing mirrors are made in-house to guarantee the highest reflectance and the lowest stray light possible. You can opt to install a standard or SAG+ mirror.
One of these cylindrical lenses, made in-house to ensure aberration-free performance, is fixed to the detector to focus the light from the tall slit onto the shorter detector elements. These lenses increase light-collection efficiency.
We offer two detectors for the “HR” Bench; both are linear CCD arrays. Each pixel responds to the wavelength of light that strikes it. Electronics bring the complete spectrum to the software.
Our proprietary filters precisely block second- and third-order light from reaching specific detector elements.
When a UV upgrade is selected, the detector’s standard BK7 window is replaced with a quartz window to enhance the performance of the spectrometer for applications <340 nm.