Thin prismatic film with 90° apex and 24 µm pitch. Published applied thickness approximately 90 µm without liners.
Manufacturer family illustration from technical guidance; not a photograph of the supplied cut part.
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Internal Reference:
BFM-03023-00
Prismatic film redirects light toward useful viewing angles. Its effect depends on the light guide, diffuser, reflector and LCD. Crossed sheets can control both axes; evaluate luminance, viewing angle and moiré in the assembled display.
Define the cut outline, usable aperture, thickness, tabs, notches, corner radii and tolerances. Identify prism direction or transmission axis, structured/coated face, liner handling and a physical orientation datum. A 0° or 45° catalog reference must be tied to the drawing datum.
Use the material in a custom optical stack or evaluate it against the original film in an existing backlight. Review luminance, uniformity, viewing angle, polarization, color and temperature behavior. Repair acceptance is based on the assembled display and agreed requirements; a similar gauge or family name does not establish equivalence.
Start with the application and available space. Develop a drawing with custom dimensions and performance specifications, review the proposed configuration, and evaluate samples where needed. Record the approved drawing revision and acceptance criteria for the supplied part. Availability and final configuration are confirmed during quotation.
3M BEF guide 2018 — maintained PDF
Review the document revision and exact grade or ordering code. Family guidance may describe a different construction; final limits belong to the selected part specification.