Photonics Calculators & Engineering Tools

Photonics Calculators & Engineering Tools | TLS

Engineering calculators for laser users, system integrators, and researchers. All tools use simplified physical models and provide indicative values only.

Input unit auto-detection: type values like 200 µm, 0.2 mm, 1e-9 s, 100 kHz, 20 W. If you enter only a number, the default unit shown in the label is assumed.

Laser & Pulse Calculators

Pulse Energy, Peak Power, Fluence & Power Density

Assumptions: circular beam; beam diameter interpreted as 1/e² diameter; flat-top approximation for fluence / intensity.

Average Power (default: W) Repetition Rate (default: Hz) Pulse Duration (default: ns) Beam Diameter (default: mm)

— (Pulse Energy)

— (Peak Power)

— (Fluence)

— (Peak Power Density)

— (Average Power Density)

Beam & Optics Calculators

Gaussian Beam Focus (Spot Size, Rayleigh Length, Divergence)

Assumptions: Gaussian beam; input diameter interpreted as 1/e² diameter; includes M² (M² ≥ 1).

Wavelength (default: nm) Input Beam Diameter (default: mm) Focal Length (default: mm) M² (optional, default: 1.0)

— (Focused Spot Diameter)

— (Rayleigh Length)

— (Half-angle Divergence)

Motion & Scanning Calculators

Scanning Speed from Repetition Rate, Spot Size & Pulse Overlap

Uses: step = spotDiameter × (1 − overlap), speed = step × repRate. Optional area rate uses hatch spacing.

Repetition Rate (default: Hz) Spot Diameter (default: µm) Pulse Overlap (default: %) Line spacing / hatch (optional, default: µm)

— (Scan Speed)

— (Distance Between Pulses)

— (Optional Area Rate, using hatch)

Spectroscopy Calculators

Spectral Resolution (Grating Spectrometer Approximation)

Approximation (Littrow, m=1): δλ ≈ (dλ/dx)·slit, with dλ/dx derived from grating equation. Use as guidance; real systems depend on angles, aberrations, and detector sampling.

Imaging Calculators

Field of View & Sampling (from Pixel Size and Magnification)

Computes object-plane sampling and field of view from sensor pixel size and magnification. Optional diffraction estimate uses λ/(2·NA).

Pixel Size (default: µm) Magnification (unitless) Sensor Pixels X Sensor Pixels Y (Optional) Wavelength (default: nm) (Optional) Numerical Aperture NA

— (Object-plane Sampling)

— (Field of View X)

— (Field of View Y)

— (Optional Diffraction-limited Resolution)

Laser Safety Calculators

Indicative NOHD (Nominal Ocular Hazard Distance)

This is an indicative geometric model using irradiance threshold. You must provide the applicable MPE for your wavelength, exposure time, and viewing condition. Always consult IEC 60825-1 and/or a Laser Safety Officer for compliance.

Assumptions & Notes

All calculators provide indicative values based on simplified physical models. Results depend on beam quality, optics, alignment, detector properties, material properties, and environmental conditions.

No output should be used as the sole basis for safety classification, certification, or compliance decisions.