ELECTRO-OPTICAL CALCULATORS
EOS Dynamics Engineering Tools
Electro-Optic Calculators
Boresight & Multi-Sensor Alignment Error Calculator
Estimate target displacement, detector pixel shift and alignment severity caused by boresight mismatch between EO/IR sensors, LRF, day camera, thermal camera or multi-sensor payload channels.
Engineering screening tool:
This calculator is intended for early boresight and multi-sensor alignment checks. It does not replace real boresight calibration, collimator alignment, gimbal calibration, LRF-camera co-alignment testing or field verification.
Sensor Geometry
Boresight Error
System Context
Target size is optional. If entered, the calculator estimates how large the boresight
shift is relative to the selected target.
Result will appear here.
Optical System Suitability Score Calculator
Evaluate lens-detector compatibility using sensor geometry, image circle coverage, diffraction sampling, MTF support and optical throughput.
Engineering screening tool:
This calculator does not replace full optical design review. It gives a structured engineering screening result for lens + detector compatibility. Final approval should still include Zemax/Code V results, tolerance analysis, measured MTF, environmental tests and product-specific requirements.
Detector
Lens
MTF Support
Use conservative lens MTF values from optical design or tolerance result.
Prefer the weaker sagittal/tangential curve and the weakest relevant field position.
Result will appear here.
Defocus Blur & Focus Tolerance Calculator
Estimate image-plane defocus blur, blur size in pixels, allowable focus tolerance and diffraction-plus-defocus spot growth for EO/IR lens-detector assemblies.
Engineering screening tool:
This calculator uses an image-space geometric blur approximation. It is useful for early focus tolerance, detector positioning and assembly sensitivity checks. It does not replace Zemax/Code V through-focus MTF, tolerance analysis or measured focus sweep testing.
Optical Parameters
Focus / Defocus
A common early screening value is 1 pixel blur diameter. For stricter imaging systems,
use 0.5 pixel. For relaxed surveillance systems, 1.5–2 pixels may be acceptable.
Optional Mechanical Context
Optional tolerances are combined by RSS to estimate total focus stack risk.
Result will appear here.
Athermalization / Thermal Focus Shift Calculator
Estimate thermal focus drift caused by lens focal length change, housing expansion and detector/lens mechanical stack movement in EO/IR optical assemblies.
Engineering screening tool:
This calculator gives a first-order thermal focus drift estimate. It does not replace full opto-mechanical athermalization analysis, Zemax thermal modeling, dn/dT material data, housing compensation design or measured hot/cold focus testing.
Optical Parameters
Thermal Inputs
Mechanical / Detector Shift
Positive compensation moves the image plane in the same direction as mechanical expansion.
Use negative value if compensation is intentionally opposite.
Result will appear here.
Line-of-Sight Jitter & Image Smear Calculator
Estimate image smear caused by platform motion, line-of-sight jitter and integration time. Useful for gimbals, UAV payloads, vehicle-mounted EO/IR systems and stabilized cameras.
Engineering screening tool:
This calculator estimates smear in image plane and detector pixels. It does not replace vibration testing, stabilization analysis, IMU/gimbal characterization or measured motion MTF.
Sensor / Lens
Motion / Jitter
System Context
Image smear reduces effective sharpness even if the optical design is good.
Long integration time and high angular rate are usually the main risk factors.
Result will appear here.
LRF / Camera Spot Alignment & Beam Footprint Calculator
Estimate laser rangefinder spot diameter, camera pixel footprint and boresight offset on target. Useful for LRF + Day TV + Thermal / SWIR multi-sensor systems.
Engineering screening tool:
This calculator assumes small-angle geometry and full-angle laser divergence. It does not replace laser beam profiling, boresight calibration, LRF receiver FOV analysis or field testing.
Camera Geometry
Laser / Boresight
Target Context
Result will appear here.
Thermal Contrast & NETD Screening Calculator
Estimate effective thermal contrast and detectability risk from target-background ΔT, NETD, optical transmission, atmospheric transmission and F-number penalty.
Engineering screening tool:
This is not an MRTD, NVThermIP or MODTRAN model. It gives a first-order thermal contrast screening result for LWIR / MWIR camera concepts and early signal budget review.
Detector / NETD
Scene / Target
Losses
Result will appear here.
Video Data Rate, Bandwidth & Storage Calculator
Estimate raw and compressed video data rate, required bandwidth and storage demand for EO/IR multi-sensor systems.
Video Format
Channels / Format
Compression / Storage
Compression ratio = Raw data / compressed data. Use 1 for uncompressed video.
Result will appear here.
