131 articles published
A USB microscope on the technician bench can honestly judge front-element scratches and surface contamination, but it cannot decide coating degradation...
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Hospital tenders that ask for lens lifetime evidence need maker documents that can sit in a regulatory file, not brochure adjectives about...
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Turning a 50 micrometre defect at 200 millimetres into a lens commitment means locking pixel pitch, image height, and a verification target...
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Codes on boxes that tilt toward the camera often read at the near edge and fail at the far edge, and that...
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Regulatory revalidation years after shipment fails when the lens maker cannot retrieve per-serial records, so the buyer must lodge the right file...
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When the maker part number and the drawing callouts disagree after a revision, receiving guesses. Print part number, drawing revision, and batch...
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Industrial grade is a commercial label, not a measurable property. On a lens datasheet the phrase usually stands for three things: a...
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Image tilt along the scan direction is a focus gradient, not a rotated picture. The two ends of the scan line reach...
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Service authorization is a scope decision, not a loyalty test. On a sealed industrial lens, the boundary between work a local shop...
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