LBTEK-Checkerboard Gratings

Product Description

Linearly polarized incident light , 2×2 uniform beam splitting available
Checkerboard phase structure with a π phase difference between adjacent pixel cells
Flat-panel structure with high uniformity and low zero-order ratio
LCP/N-BK7 window material, no mechanical housing, 1.5 mm single-sided chamfer
Operating wavelengths: 532, 633, 1064 nm, pixel size: 36×36 μm
Custom sizes with parameter specifications available

LBTEK Checkerboard Grating (CG) is fabricated on an N-BK7 glass substrate using birefringent liquid crystal polymer (LCP) material, featuring a sandwich structure of "front and rear glass substrates + intermediate LCP functional film layer" without a mechanical housing, with a 1.5-mm single-sided chamfer. In the LCP layer, liquid crystal molecules are arranged in a checkerboard-like pattern, with uniform orientation angles within each pixel cell and a phase difference of π between adjacent pixel cells. The entire device plane exhibits the same λ/2 retardation, making it a single-wavelength device. The checkerboard grating is primarily used to achieve 2×2 uniform beam splitting. Compared to the three-piece cascaded grating structure, the checkerboard grating can achieve 2×2 beam splitting with a single piece, making it easier to integrate. LBTEK offers standard checkerboard gratings with working wavelengths of 532 nm, 633 nm, and 1064 nm, featuring a pixel size of 36×36 μm. Custom parameter specifications are also available to meet diverse application needs. For details, please consult LBTEK technical support.

Diagram

Attributes

Component MaterialLiquid Crystal Polymer/N-BK7 Window Plate

Transmitted Wavefront Error＜λ/4@633 nm

Component sizeØ25.4×3.2 mm, single-side chamfer

Retardance Accuracy±5 nm

Clear Aperture15×15 mm

Delay Uniformity±5 nm

Surface Quality (Scratch/Dig)60/40

Diffraction efficiency>60%

Operating Temperature-20~80℃

Beam splitting uniformity>90%

Checkerboard Grating

Optical Element Material: Liquid Crystal Polymer / N-BK7 Window
Clear Aperture: 15 mm × 15 mm
Operating Wavelengths: 532 nm, 633 nm, 1064 nm

LBTEK Checkerboard Grating is fabricated on N-BK7 windows with a dual-substrate structure and a total thickness of 3.2 mm. It provides a constant phase retardance across the entire clear aperture, equal to half the operating wavelength (i.e., λ/2). At the operating wavelength, the transmitted light from adjacent pixels has a phase difference of π, producing a defined diffraction pattern. LBTEK offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.

Checkerboard Grating Microstructure

Product Model	Operating Wavelength	Pixel Size	Unit Price	Lead Time
LCCG25-532-36	532 nm	36 × 36 μm	$1,073.65	4 weeks	Add Cart
LCCG25-633-36	633 nm	36 × 36 μm	$1,073.65	4 weeks	Add Cart
LCCG25-1064-36	1064 nm	36 × 36 μm	$1,073.65	4 weeks	Add Cart