Ocean Optics Linear Variable Filters - Manual (Page 2)

Linear Variable Filters
Linear Variable Filters 2
The FHS-LVF is an inline sampling optic with two collimating lenses for use with both single and double filter slide
carriers. The FHS-LVF is designed for use with reflection probes such as the R600-7-UV/125F for measurements
from surfaces.
The LVF-HH (optional) is similar to the LVF-H. However, it contains two LFV-H filters epoxied into a single slide
carrier. This doubles the effectiveness of the filter but, since the light must pass through a second layer, also
decreases the amount of energy that passes through the filter.
The LVF-LL (optional) is similar to the LVF-L. However, it contains two LFV-L filters epoxied into a single slide
carrier. This doubles the effectiveness of the filter but, since the light must pass through a second layer, also
decreases the amount of energy that passes through the filter.
Configuring Linear Variable Filter Kit Components
Follow the steps below to configure the various components of the Linear Variable Filter Kit:
Configuring Adjustable Bandpass Linear Variable Filters (LVF-HL)
Adjustable Bandpass LVFs consist of two separate filters epoxied into two separate slide carriers. These slide
carriers must be aligned and connected properly in order for the LVF to function as designed.
Follow the steps below to configure your Adjustable Bandpass LVF:
1. Locate the two slide carriers that contain the LVF-L and the LVF-H filters.
The LVF-H filter has a long, oval-shaped hole at the top of the filter to accommodate the setscrews. The
LVF-L filter has four holes bored into the slide carrier to accommodate the setscrews.
If necessary, hold each filter up to a natural light source to identify the LVF-L and LVF-H filter. When
oriented correctly, the LVF-L filter contains a blue coating on the left side of the filter and the LVF-H filter
contains a red coating on the right side of the filter.
2. Align the filters so that the LVF-H (red) filter is on the top with the red coating on the right side and the
LVF-L (blue) filter is underneath with the blue coating on the left side (see diagram below).
Orientation of Linear Variable Filter slides – Align the LVF-H slide directly over the LVF-L slide as illustrated, then
secure with setscrews
3. Insert each of the four setscrews into the groove in the LVF-H and tighten each screw into the holes on
the LVF-L.
You have now properly assembled the LVF-HL Adjustable Bandpass Filter for use. See the Using the LVF-HL
Adjustable Bandpass Filter section for operating instructions.