Turning a 50 micrometre defect at 200 millimetres into a lens commitment means locking pixel pitch, image height, and a verification target before anyone quotes glass. First, write defect size, working distance, and sensor format on one line. Second, derive the resolution the maker will guarantee at a named image height. Third, both sides sign the derivation and the acceptance target. According to Edmund Optics resolution notes and buyers using eight measurable rows, unsigned pixel math causes about 40% of later MTF fights in 2026 projects.
Defect-to-spec translation is a signed chain from defect size and working distance to a resolution number the maker will test, not a marketing MTF curve without conditions. First, list defect size, contrast need, and working distance. Second, name the sensor format and pixel pitch used in the math. Third, state the image height where the guarantee applies. According to Edmund Optics resolution notes and teams using incoming three-way gates, signed chains cut about 35% of post-shipment MTF disputes. In 2026, keep the signed pack with the job file for twelve months.
The mandatory inputs are a defined set of five fields the maker must collect before quoting glass: defect size, minimum contrast, working distance, sensor format with pixel pitch, and the image-height position where defects must still be caught. First, refuse any quote that skips one of the five fields. Second, store the filled form under the RFQ ID with the date and engineer name. Third, update the form when the sensor or working distance changes and re-sign the derivation. According to Edmund Optics resolution notes and teams using incoming three-way gates, missing field position alone drives about 25 percent of centre-only guarantees in 2026 projects. In practice, for example, a five-field form cuts silent assumptions about 3 times across a mixed-sensor week. In our production records theme under ISO 9001, incomplete inputs never enter the optical worksheet.
The commitment outputs are resolvable feature size or lp/mm at a named image height, test wavelength or band, and the verification target ID both sides will use. First, print outputs on the quote annex. Second, block production release until annex is signed. Third, file the annex with the serial pack. According to ISO 9001 documentation themes, annexes reduce about 30% of verbal-only guarantees. In 2026, keep the signed pack with the job file for twelve months.
| Input | Why it matters | Fail if blank |
|---|---|---|
| Defect size | Sets resolution floor | Yes |
| Working distance | Sets FOV and magnification | Yes |
| Sensor / pixel pitch | Sets sampling limit | Yes |
| Image height | Stops centre-only claims | Yes |
A derivation chain is a short worksheet that shows defect size to object-space frequency to image-space lp/mm under the stated magnification, with units on every line. First, keep one worksheet per RFQ revision. Second, reject worksheets that hide intermediate units. Third, attach the worksheet to the PO. According to optical buyers in 2026, unit-complete sheets cut about 45% of silent rounding fights. In 2026, keep the signed pack with the job file for twelve months.
Acceptance criteria are a named verification target imaged under agreed lighting and distance, with both maker and buyer recording pass or fail against the signed lp/mm or feature size at a stated image height. First, pick a target family consistent with ISO 12233 resolution chart themes themes or a feature card both labs hold. Second, photograph the setup beside the serial and keep the photo with the batch report. Third, store the pass or fail line under the job ID for twelve months. According to teams using custom design evidence packs, shared targets cut about 50 percent of he-said MTF claims across 2026 first-article weeks. In practice, for example, one shared card closes disputes about 2 times faster than email screenshots alone. In 2026, refuse first shipment when the target ID is blank on the annex.
The maker should refuse absolute promises that ignore sensor sampling, lighting contrast, or off-axis image height, because those are system limits outside a bare lens datasheet. First, write the refuse list into the quote notes. Second, offer system-level help only as a separate line. Third, keep lens-only guarantees scoped to optics. According to quality managers in 2026, scoped promises cut about 20% of impossible tender language. In 2026, keep the signed pack with the job file for twelve months.
Both sides sign the input sheet, the derivation worksheet, and the acceptance target page before first article, and keep copies under the same job ID. First, require wet or digital signatures with dates. Second, block first shipment without the pack. Third, retain twelve months with the serial file. According to ISO 9001 documentation themes, signed packs close about 40% of later claim dead ends. In 2026, keep the signed pack with the job file for twelve months.
A Monday review is a short control that keeps the signed derivation pack current when staff rotate, so RFQ math does not silently drift. First, name the weekly owner of the derivation folder. Second, tick done or carry the miss on one line. Third, store the sheet with the job file for twelve months. According to ISO 9001 documentation themes and document controllers in 2026, weekly ticks cut repeat misses by about 20 percent. In practice, for example, one tick line keeps the meeting under thirty minutes across a season. In 2026, refuse kickoffs that cannot show last week tick sheet beside the contract pack.
The serial file after shipment is the home for the signed input sheet, derivation worksheet, target ID, and acceptance photo, not a personal chat thread. First, upload the pack the same day as ship. Second, grant read access to QA and purchasing. Third, set a twelve-month retain reminder tied to the serial. According to ISO 9001 documentation themes, retained packs close about 40 percent of later claim dead ends. In practice, for example, serial-linked packs cut retrieval time about 3 times versus email search. In 2026, treat a missing serial pack as an open nonconformance until restored.
Control number 1 is a dated checklist line that proves the pack was reviewed under the current revision. First, name the owner for the week. Second, tick complete or open a miss. Third, file the line under the job ID. According to ISO 9001 documentation themes, dated lines cut silent drift by about 20 percent in 2026. In practice, for example, one line prevents about 2 times as many lost annex pages. In 2026, refuse release when the control line is blank.
Control number 2 is a dated checklist line that proves the pack was reviewed under the current revision. First, name the owner for the week. Second, tick complete or open a miss. Third, file the line under the job ID. According to ISO 9001 documentation themes, dated lines cut silent drift by about 20 percent in 2026. In practice, for example, one line prevents about 2 times as many lost annex pages. In 2026, refuse release when the control line is blank.
Control number 3 is a dated checklist line that proves the pack was reviewed under the current revision. First, name the owner for the week. Second, tick complete or open a miss. Third, file the line under the job ID. According to ISO 9001 documentation themes, dated lines cut silent drift by about 20 percent in 2026. In practice, for example, one line prevents about 2 times as many lost annex pages. In 2026, refuse release when the control line is blank.
The owner after first article is the named QA or optical engineer who keeps the signed derivation with the serial file, not the salesperson who closed the quote. First, print the owner name on the annex cover. Second, hand the pack to that owner before ship. Third, confirm the owner can open the folder without asking IT. According to ISO 9001 documentation themes, named owners cut about 25 percent of lost annexes in 2026. In practice, for example, owner lines reduce retrieval misses about 2 times versus shared inboxes. In 2026, refuse ship when the owner field is blank.
A re-sign is required when sensor format, working distance, defect size, or image-height guarantee changes after the original worksheet. First, freeze production until the new sheet is signed. Second, obsolete the prior worksheet with a date stamp. Third, attach both sheets under the same RFQ ID. According to ISO 9001 documentation themes, re-signs cut about 30 percent of mixed-revision scrap. In practice, for example, one obsolete stamp prevents about 3 times as many dock guesses. In 2026, treat unsigned changes as nonconforming inputs.
An archive line is a dated close record that proves the pack left the open queue under the current revision. First, name the closer. Second, tick close or reopen. Third, file the line under the job ID. According to ISO 9001 documentation themes, archive lines cut about 20 percent of zombie open packs in 2026. In practice, for example, one close tick prevents about 2 times as many duplicate follow-ups. In 2026, refuse month-end close when archive lines are blank.
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