Diffraction Limit / Optimal Aperture Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-077

Effect

Computation or source lookup only

Input and validation requirements

The specification does not state validation behavior for zero megapixels, zero or negative pixel pitch, or other nonphysical inputs. Zero megapixels creates a division-by-zero during derived pixel-pitch calculation, while negative pixel pitch produces sign-dependent and physically invalid outputs unless explicitly rejected or converted to an absolute magnitude.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "manual_pixel_pitch_mm": 0.004,
    "wavelength_mm": 0.00055
  },
  "expected_outputs": {
    "diffraction_limited_f_number": 5.961252,
    "airy_disk_diameter_mm": 0.008
  },
  "working": "1.22*λ = 1.22*0.00055 = 0.000671 mm. N = 0.004/0.000671 = 5.961252. Airy diameter = 2.44*0.00055*5.961252 = 0.008000 mm, equivalently 2*0.004 = 0.008000 mm."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json