Today, a repaired or incoming endoscope gets a verdict by eye. Kestrel replaces judgment with measurement.
Kestrel is a portable instrument that quantifies the optical properties that determine whether a rigid endoscope still performs — resolution, distortion, field and apparent field of view, direction of view, field-stop run-out, color transmission, brightness uniformity, diopter error, and chromatic aberration — with methods aligned to published ISO 8600 test standards.
The result is a number you can put in a quality record and defend: a per-scope pass/fail verdict with a quantitative report, repeatable across operators and sites. It measures the optics — not a camera's image processing.
Quantitative modulation transfer function — the resolution the scope actually delivers.
Grid-based distortion mapping across the full field.
Angular field of view and direction of view against stated values.
Rotational eccentricity — a direct check on centration.
Per-channel relative transmission — the color the optics deliver.
Angular extent of the image at the eyepiece — the basis for cycles-per-degree resolution.
Relative illumination centre-to-edge — the vignetting across the field.
Eyepiece focus deviation from infinity; axial and lateral color error per channel.
Light through the illumination bundle via the light post — among the most common real-world failure modes.
Certify a repaired or incoming scope objectively — a defensible pass/fail for your customers, at the repair bench.
Incoming and outgoing optical QC referenced to the same ISO methods your auditors recognize.
Verify scope optical health beyond a visual check, before it reaches the OR.
Interested in evaluating Kestrel, or in quantitative optical QC for your repair or production workflow? Contact us.