AT-HDVS-CAM-HDMI
16
NOTE:
When calculating the Angle of View, using a calculator that is set to radians, multiply the result
by to convert the answer to degrees. The value of
can be approximated as 3.1415.
Device Operation
Calculating Specific Values
In order to calculate custom values, this section introduces some trigonometric formulas which can be used to find
the Linear Field of View (L), Distance (d), or the Angle of View (
q
). The derivation of each formula is beyond the scope
of this manual. As long as any two values are known, the third value can be calculated as follows:
Linear Field of View (FOV)
Angle of View
Distance to target
In the following diagram, the camera angle of view is set to 54.7°. The viewing area to be captured is measured to be
9 feet. How far from the target must the camera be placed in order to capture this area?
Example
Distance = ?
Angle of View = 54.7°
Linear FOV = 9.0 feet
AT-HDVS-CAM
Target
1. Use the following formula:
2. Substitute the known values for each variable in the
equation. In this case, we know both the linear FOV
and the angle of view. Therefore:
L
= 9
q
= 54.7
3. The equation becomes:
4. =
0.5172
5. Multiplying this result by 2 gives:
1.0344
6. Dividing
9
by
1.0344
, yields:
8.700
. Therefore, the
camera must be placed
8.7
feet from the target.
