Granted Patent B2

US 12,613,439 · App. 18/882,593 · Granted Apr 28, 2026

Inventors: Jonathan David Waldern (Diablo, CA); Ratson Morad (Palo Alto, CA); Alastair John Grant (San Jose, CA); Sihui He (Sunnyvale, CA); Shibu Abraham (Sunnyvale, CA); Milan Momcilo Popovich (Leicester, GB)

Assignee: DigiLens Inc.

G02F1/1326B05C5/004B05C5/0204B05C5/0291B05C5/0295B29D11/0074B29D11/00769B82Y20/00G02B5/1828G02B5/1857G02B6/122G02B6/13G02B27/0081G02B27/0172G02B27/0944G03H1/00G02B5/1871G02B5/3016G02B2006/12107G02B2006/12116G02B2006/12166G02B2207/101

Abstract

Claims (13)

1 . A system for fabricating a grating, the system comprising:

a deposition head connected to a reservoir containing a mixture of optical recording material;

a first substrate having at least one predefined region for supporting gratings;

a positioning element capable of positioning the at least one deposition head across the first substrate;

a holographic exposure apparatus for exposing the first substrate, wherein:

the deposition head is configured to deposit the mixture of optical recording material onto the first substrate using the positioning element,

the holographic exposure apparatus is configured to holographically expose the at least one predefined region of the first substrate after the mixture of optical recording material is deposited onto the first substrate, and

the deposited material provides a predefined grating characteristic within the at least one predefined region after holographic exposure.

2 . The system of claim 1 , wherein the deposition head is connected to a first reservoir containing a first mixture of optical recording material and a second reservoir containing a second mixture of optical recording material.

3 . The system of claim 2 , wherein the first mixture of optical recording material comprises a liquid crystal and a monomer; and the second mixture of optical recording material comprises a monomer; wherein the at least one deposition head is configured to deposit the first mixture of optical recording material onto the at least one predefined grating region.

4 . The system of claim 1 , wherein the deposition head comprises a inkjet print head.

5 . The system of claim 1 , wherein the predefined grating characteristic comprises a characteristic selected from the group consisting of: refractive index modulation, refractive index, birefringence, liquid crystal director alignment, and grating layer thickness.

6 . The system of claim 1 , wherein the predefined grating characteristic results in a grating after holographic exposure, the grating having a spatially varying diffraction efficiency.

Assignments (1)

Continuity (9)

References Cited (400)