5 Discovery Way, Acton, MA 01720 Phone: (978)263-3584, Fax: (978)263-5086 Web Site: www.princetoninstruments.com LS 785 High Throughput Lens Spectrograph User Manual Ver. 1.
Table of Contents Chapter 1 -- General ........................................................................................... 5 Description .............................................................................................................................................. 5 Features and Benefits .............................................................................................................................. 5 Recommended Detectors..................................................
iv Figure 2-11. Figure 2-12. Figure 2-13. Figure 2-14. Figure 2-15. Figure 2-16. LS 785 High Throughput Lens Spectrograph User Manual Manual Slit.......................................................................................................................................... 16 Shutter Assembly ................................................................................................................................ 16 10 mm Insert with Fiber....................................................
Chapter 1 -- General Description The Acton LS 785 is an 85 mm focal length high throughput lens spectrograph specifically designed and optimized for near infrared (NIR) applications. The system features fast f/2 lenses for maximum light gathering power and proprietary anti-reflection coatings for exceptional throughput from 750-1050nm. The unique multielement f/2 lenses provide a flat 2D focal plane optimized for a wide variety of Princeton Instruments CCD detectors up to 8 mm x 27 mm.
LS 785 High Throughput Lens Spectrograph User Manual Inside the LS 785 Focusing Lens Grating Focus Adjustment PIXIS CCD Detector Wavelength Adjustment Collimating Lens Entrance Slit Adjustment Shutter Entrance Slit X-Y Fiber Adapter
Chapter 2 -- Operation Hardware Installation Mounting the Detector to the LS 785 Optional adapter flanges are available with this LS 785 for the following Princeton Instrument CCD detectors: 1. PIXIS with spectroscopy flange and without shutter. 2. Spec 10 LN w/o shutter 3. Spec 10 LN w/ integrated shutter Each detector adapter flange is labeled with the name of the CCD detector for which it was designed. Refer to Appendix B for detailed instructions for mounting the detector to your spectrometer.
LS 785 High Throughput Lens Spectrograph User Manual WinSpec Software and the LS 785 Software Installation 1. Verify that the detector (and controller) is connected to the computer and that the detector is turned on. 2. Turn on your computer. 3. If WinSpec/32 was purchased with the LS 785, install WinSpec/32 using the installation disk and password supplied. 4. When prompted to “Select Installation Type, select “Complete” to insure installing necessary components. 5.
Chapter 2--Operation 9 Focus Adjustment When purchased with a Princeton Instruments CCD detector, the LS 785 is normally focused and aligned at the factory and shipped as an integrated system ready to operate. In this instance no further adjustments are required. We do recommend focus adjustments in the following instances: 1. The grating has been adjusted to a new wavelength position. 2. A CCD is purchased separately from the LS 785 and is being installed at the customer’s facility. 3.
LS 785 High Throughput Lens Spectrograph User Manual LightField Software and the LS 785 Software Installation 1. Verify that the detector (and controller) is connected to the computer and that the detector is turned on. 2. Turn on your computer. 3. Verify that your computer can be connected to the Internet. Internet connectivity is required for product activation. 4. If LightField was purchased with the LS 785, install LightField using the installation disk and product key supplied. 5.
Chapter 2--Operation 11 13. Click on the IntelliCal button to open IntelliCal. 14. Select the Target Accuracy and then click on Start Calibration. 15. The calibration process will start and continue to completion without any further actions required from you. Calibration can take several minutes, especially if you have selected Fine for the target accuracy. Be patient. 16.
LS 785 High Throughput Lens Spectrograph User Manual 6. If the CCD detector has a shutter or is controlling a shutter, open the Trigger/Shutter expander and set the Shutter Mode to Always Open. 7. Click on the View tab on the Experiment workspace and then click on the Preview button to begin continuous live data acquisition. 8. Rotate the focusing micrometer until the best focus (image quality or spectral resolution) is obtained. CAUTION: Do not apply excessive force to the knob.
Chapter 2--Operation 13 Manual Slit Width Adjustment The slit width of the bilateral slit assembly is adjustable from 0.010 millimeters to 3 millimeters (10 to 3,000 µm) by a micrometer located on the top of the slit housing. The micrometer knob is graduated in 0.010 millimeter (10 µm) increments. Each clockwise revolution of the micrometer knob increases the slit width 0.25 millimeters (250 µm).
LS 785 High Throughput Lens Spectrograph User Manual Grating Assembly Interchange The LS 785 grating assembly is initially aligned at the factory and kinematically mounted in the instrument to enable easy interchange without requiring realignment. Note that if a grating is purchased later, it will require alignment to the LS 785 and instructions will be provided with the purchased grating assembly.
Chapter 2--Operation 10. Replace and secure the LS 785 cover. Place the previously removed grating assembly in the storage container and secure it using the knurled screw. Tighten the two captive screws to secure the grating assembly in the storage container and then replace the lid. 11. At this point you must tell the WinSpec software what grating is currently installed and load the appropriate calibration. Refer to Steps 6-9 on page 8 for more information.
LS 785 High Throughput Lens Spectrograph User Manual Shutter Replacement The following instructions apply if the LS 785 was shipped from the factory with an installed external shutter. Because a shutter has a finite lifetime, it may become necessary to replace a shutter. Tools: 9/64” hex wrench Procedure: 1. Remove any accessories attached to the entrance slit. Using a 9/64” hex wrench, remove the four screws holding the X-Y Stage.
Chapter 2--Operation 17 X-Y Fiber Adapter The universal XY fiber adapter allows an optical fiber which is terminated in a 10mm ferrule, SMA connector or FC connector to be positioned horizontally and vertically over a 5mm range in each direction to correctly position the end of the fiber on the center of the slit or optical axis. Tools: 1/16” hex wrench 9/64” hex wrench Procedure: 1.
LS 785 High Throughput Lens Spectrograph User Manual Figure 2-16. X-Y Stage Adjustment 5. Take a full image while running the CCD detector in Focus mode. 6. Identify a suitable peak (for example, Neon at 837.6 nm). 7. Zoom in on the peak into a window approximately 25 pixels x 25 pixels. 8. Click on the Autoscale button at the bottom of the window so that only the brightest pixels can be seen. 9. Make sure the brightest pixel is not saturating the CCD detector.
Appendix A – Specifications Outline Drawing 19
LS 785 High Throughput Lens Spectrograph User Manual Relative Wavelength Coverage with 1200 g/mm Grating Laser (nm) Working range (cm-1)* Coverage (cm-1)** 785 120 - 3215 1985 805 120 - 2898 1884 830 120 - 2524 1768 *Lower working range for Raman Spectroscopy applications is ultimately limited by the selection of the optional notch or edge filters. The upper wavelength range of 1050 nm is limited by practical detection wavelength of Si-based CCD detectors. ** With 26.
Appendix B -- Mounting the Detector The following procedures are recommended for mounting detectors and their associated adapters to the LS 785. Refer to the photographs for additional information. 1. Determine the detector to be attached to the LS 785. 2. Locate the correct adapter flange or adapter flange assembly for the detector to be attached to the LS 785. 3. If the correct adapter is not attached to the LS 785, refer to the photograph of the adapter attached and remove it. 4.
LS 785 High Throughput Lens Spectrograph User Manual PIXIS Tools: 5/32” hex wrench 5/16” wrench Procedure: 1. If detector other than a PIXIS was previously mounted to the LS 785, re-install the four #8-32 socket head screws and washers used in the instrument housing to secure the other adapter. 2. If the spacer is not installed, mount it to the face of the LS 785 with three (3) #10-32 socket head screws (5/32” hex wrench). 3.
Appendix B -- Mounting the Detector 23 Spec 10 LN with Integrated Shutter Tools: 9/64” hex wrench 5/32” hex wrench Procedure: 1. Locate the Spec 10 LN detector with an internal shutter and its adapter flange. 2. If another adapter is mounted to the LS 785, remove that adapter (and, in the case of the PIXIS, the adapter and spacer). 3. Using a 9/64” hex wrench, remove the four #8/32 socket head screws with washers from the face of the LS 785. 4.
LS 785 High Throughput Lens Spectrograph User Manual Spec 10 LN without Shutter Tools: 9/64” hex wrench for removing 4 screws with washers. 5/32” hex wrench for removing three socket heads holding spacer on. Procedure: 1. If another adapter is mounted to the LS 785, remove that adapter (and, in the case of the PIXIS, the spacer). 2. Using a 9/64” hex wrench, remove the four #8/32 socket head screws with washers from the face of the LS 785. 3.