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CN-122015648-A - Detection method of optical diaphragm

CN122015648ACN 122015648 ACN122015648 ACN 122015648ACN-122015648-A

Abstract

The invention discloses a detection method of an optical film, and relates to the technical field of optical film detection. The method comprises the steps of cutting an optical diaphragm to obtain a diaphragm preliminary sample, vertically placing the diaphragm preliminary sample in a mold, preparing a metallographic cold mosaic material, pouring the metallographic cold mosaic material into the mold, and removing the mold after the metallographic cold mosaic material is solidified, grinding a supporting block, and placing a detection sample under a microscope for side projection detection to obtain microstructure size data of the optical diaphragm. According to the detection method of the optical film, the omnibearing fixed protection of the optical film sample is realized through the solidification of the metallographic cold mosaic material, the microstructure is not damaged in the grinding process, and the damaged part of the microstructure of the optical film at the notch can be removed through grinding, so that an ideal original form is displayed on an observation surface, the inclined damage structure caused by external force damage is not generated, the design result is accurately fed back, and the accurate detection of the size data of the microstructure by a subsequent microscope is facilitated.

Inventors

  • YU CHUNHUA
  • WU PENG

Assignees

  • 苏州晶智科技有限公司

Dates

Publication Date
20260512
Application Date
20260326

Claims (10)

  1. 1. The method for detecting the optical diaphragm is characterized by comprising the following steps of: S1, cutting an optical film to obtain a film primary sample; S2, providing a mould (2) with the volume larger than that of the sample, and vertically placing the preliminary sample of the membrane in the mould (2); S3, preparing a metallographic cold mosaic material, pouring the metallographic cold mosaic material into the die (2), and passing through a preliminary sample of the diaphragm; S4, after the metallographic cold mosaic material is solidified, forming a supporting block (3), positioning a diaphragm primary sample inside the supporting block (3), and demolding the supporting block (3); s5, grinding the support block (3) until the notch of the diaphragm primary sample is exposed, continuing grinding until the notch of the diaphragm primary sample is completely ground, taking the rest part as a detection sample, and placing the detection sample under a microscope for side projection detection to obtain microstructure size data of the optical diaphragm.
  2. 2. The method for detecting an optical film according to claim 1, wherein in S2, a clamp (1) is required to be provided, and the clamp (1) clamps the film primary sample in a bonding and fixing manner and then places the film primary sample in the mold (2).
  3. 3. A method of inspecting an optical film according to claim 2, wherein the slit of the film primary sample is facing the top of the mould (2).
  4. 4. The method for detecting an optical film according to claim 1, wherein in the step S3, the metallographic cold mosaic material is prepared by adopting a curing agent and acrylic powder according to a preset proportion, and uniformly stirring is performed during the preparation process until no granular agglomeration exists, and then pouring is performed.
  5. 5. The method for detecting an optical film according to claim 1, wherein the curing agent is any one of epoxy resin and acrylic resin.
  6. 6. The method for detecting an optical film according to claim 1, wherein in S4, the filling amount of the metallographic cold mosaic material fills the cavity of the mold (2), and the solidification environment is a normal temperature and pressure environment.
  7. 7. The method for detecting the optical film according to claim 2, wherein in the step S4, the curing time of the metallographic cold mosaic material is 1 h-2 h, and the support block (3) formed after curing, the film primary sample and the clamp (1) form an integrated cured sample.
  8. 8. The method for detecting an optical film according to claim 1, wherein in the step S5, the supporting block (3) is polished by a polisher, and the polishing mode is stepwise polishing, in which a rough polishing process is used to remove redundant metallographic cold mosaic material, and in which a fine polishing process is used to polish the notch of the preliminary sample of the film.
  9. 9. The method for detecting an optical film according to claim 8, wherein the number of grinding discs used in the rough grinding process is 400-600 mesh.
  10. 10. The method of claim 8, wherein the number of grinding discs used in the fine grinding process is 1000-1200 mesh.

Description

Detection method of optical diaphragm Technical Field The invention relates to the technical field of optical film detection, in particular to a detection method of an optical film. Background The optical performance of the optical film is realized by matching an optical microstructure with UV adhesive, and whether the microstructure of the optical film meets the design requirement after coating is finished directly determines whether the performance of the optical film meets the standard, so that the detection of the microstructure of the optical film is a key link in the manufacturing process of the optical film. Currently, three methods for detecting the microstructure of an optical film (film formed by UV glue) exist in the prior art. The first is to cut the membrane with scissors and then use the side projection detection of the microscope. The second is to use hammer and blade to strike the cut membrane and then use the projection of the side of the microscope to detect. The third is three-dimensional morphological analysis using a high-precision 3D microscope. However, the former two direct cutting methods are very easy to cause deformation and damage to the microstructure of the optical film (the deformation and damage degree is related to the strength of the microstructure) during the film cutting process, and the size data of the microstructure cannot be accurately obtained, so that whether the microstructure accords with the original optical structure design cannot be effectively confirmed. And thirdly, a high-precision 3D microscope detection mode is adopted, the equipment purchasing and using cost is too high, certain difference can exist between the three-dimensional graph synthesized by the equipment and the microstructure of a product object, and the accuracy of a detection result is still lacking. Disclosure of Invention The invention provides a detection method of an optical film, which can solve the problem that the microstructure of the optical film is easy to damage and the detection result deviation is larger in the prior art. A method of detecting an optical film, comprising: S1, cutting an optical film to obtain a film primary sample; S2, providing a mould with the volume larger than that of the sample, and vertically placing the initial sample of the diaphragm in the mould; S3, preparing a metallographic cold mosaic material, pouring the metallographic cold mosaic material into the mold, and allowing the metallographic cold mosaic material to pass through a preliminary sample of the diaphragm; S4, after the metallographic cold mosaic material is solidified, forming a supporting block, and demoulding the supporting block after a preliminary sample of the membrane is positioned in the supporting block; and S5, grinding the support block until the notch of the diaphragm primary sample is exposed, continuing grinding until the notch of the diaphragm primary sample is completely ground, taking the rest part as a detection sample, and placing the detection sample under a microscope for side projection detection to obtain microstructure size data of the optical diaphragm. Compared with the prior art, the detection method of the optical film provided by the invention has the following beneficial effects: According to the detection method of the optical film, the omnibearing fixed protection of the optical film sample is realized through the solidification of the metallographic cold mosaic material, the microstructure is not damaged in the grinding process, and the damaged part of the microstructure of the optical film at the notch can be removed through grinding, so that an ideal original form is displayed on an observation surface, the inclined damage structure caused by external force damage is not generated, the design result is accurately fed back, and the accurate detection of the size data of the microstructure by a subsequent microscope is facilitated. Further, in the step S2, a clamp is required to be provided, and the clamp clamps the preliminary sample of the membrane in a manner of attaching and fixing, and then places the preliminary sample of the membrane in the mold. Further, the cut-out of the preliminary sample of film is facing the top of the mold. Further, in the step S3, the metallographic cold mosaic material is prepared by adopting a curing agent and acrylic powder according to a preset proportion, and is uniformly stirred in the preparation process until no granular agglomeration exists, and then is poured. Further, the curing agent adopts any one of epoxy resin or acrylic resin. Further, in the step S4, the filling amount of the metallographic cold mosaic material fills the cavity of the mold, and the solidification environment is a normal temperature and pressure environment. Further, in the step S4, the curing time of the metallographic cold mosaic material is 1-2 hours, and the support block formed after curing, the diaphragm primary sample and the clamp form an in