Teledyne Princeton Instruments NIRvana HS, System Manual

Page: 40 / 107

40 NIRvana HS System Manual Issue 1.0
3. Adjust the lens aperture, intensity scaling, and focus for the best image as viewed on
the computer monitor. Imaging tips include:
•
Begin with the lens blocked off and then set the lens to the smallest possible
aperture (i.e., the greatest f-stop number.)
• Verify there is a suitable target in front of the lens. An object with text or
graphics works best.
• Check the brightest regions of the image to determine if the A/D converter is at
full-scale. A 16-bit A/D is at full scale when the brightest parts of the image
reach an intensity of 65535. Adjust the aperture so that it is just slightly smaller
(i.e., a greater f-stop,) than the setting where maximum brightness on any part
of the image occurs.
• Set the focus adjustment of the lens for maximum sharpness in the viewed
image.
4. After the camera has been focused, stop Preview mode, continue Preview mode,
begin Acquire mode, wait for the sensor to reach the operating temperature before
going to Acquire mode, or shut down the system. Refer to
Section 6.1.2, Shut Down
Procedure , for the proper shut down procedure.
6.1.2 Shut Down Procedure
Perform the following procedure to safely shut down a LightField experiment:
1. Close LightField.
2. Turn off the camera power.