Resources / Calculators
Engineering calculators.
Estimate IFOV, pinhole diameter, and 4-bar target dimensions using the same input and result patterns across all four tools.
Available tools
Choose the calculation that matches your test setup.
Use the calculator that matches the measurement task, then confirm the result against the applicable SBIR product or system configuration.
IFOV Calculator
Calculate instantaneous field of view from detector element size and focal length, or from field of view and pixel count.
- Inputs
- Detector or FOV values
- Result
- IFOV in mRad
Pinhole Target Calculator
Calculate a recommended pinhole target diameter using collimator focal length, sensor IFOV, and the selected IFOV multiple.
- Inputs
- Focal length, IFOV, multiple
- Result
- Diameter in inches
4-Bar Target Calculator
Calculate recommended 4-bar target sizes and spatial frequencies from sensor IFOV and collimator focal length.
- Inputs
- IFOV and focal length
- Results
- Target widths and frequencies
4-Bar Width Calculator
Convert a desired spatial frequency and collimator focal length into a 4-bar target width in inches.
- Inputs
- Focal length and frequency
- Result
- 4-bar width in inches
Use the calculators as part of a controlled test workflow.
Keep units consistent, record the assumptions used, and confirm the result against the applicable system configuration.
Engineering-use note
Calculator outputs are planning aids based on the values entered. Confirm final target, optical, and system requirements with the applicable SBIR documentation or engineering team.
Need help applying a result?
Share the intended product, quantity, and test requirements with the SBIR sales team.
