Diffractive Optical Elements (DOE)
DOE technologies are emerging in the optics industry. Its applications range from technical optics such as scanning and metrology to bioimaging and printing. DOEs are added to laser systems to control the incident beam’s phase and amplitude and to ‘shape’ the beam to a desired output pattern with distinctive functionality. It uses a surface complex microstructure to direct photons for specific functions.
Top Hat Beam Shapers
A Top Hat Beam Shaper is a form of DOE that transforms a Gaussian (TEM00) input laser beam into a uniform intensity spot of the desired shape. This output point can be round, square, rectangular as desired. The uniform intensity allows for sharper edges instead of a concentrated spot of intensity given by a Gaussian beam spot. This setup comprises a laser source, Beam Shaper DOE, scan system/lens, and a working surface.
Material: Fused Silica
Beam Mode: SM or TEM ₀₀ with M²<1.5
Transmission Efficiency: ̴ 100%
Overall Efficiency: ̴ 90-95%
Shape: Circular, Rectangular
Type: Window
Coating: AR/AR @ 532nm, 1064nm
| Part No. | Wavelength(nm) | Input BeamDia (mm) | F-Theta FL (mm) | DOE Size (mm) | Beam Shape | Flat Top Beam Size (μm) |
|---|---|---|---|---|---|---|
| DOE-SCAN-355-100C-3 *NEW* | 355 | 3.0 | 100 | 16 x 16 x 3 | Circular | 20 |
| DOE-SCAN-355-TSL50-C *NEW* | 355 | 3.5 | 50 | 16 x 16 x 3 | Circular | 10 |
| DOE-SCAN-355-160C *NEW* | 355 | 1.0 | 160 | 16 x 16 x 5.5 | Circular | 125 |
| DOE-SCAN-355-160S *NEW* | 355 | 3.5 | 160 | 16 x 16 x 3 | Square | 35 |
| DOE-SCAN-532-330 | 532 | 3.0 | 330 | - | Circular | 120 |
| DOE-SCAN-1064-163 | 1064 | 7.0 | 163 | 25.4 x 3.0 | Rectangular | 164 x 125 /201 x 126 |
| DOE-SCAN-1064-254C | 1064 | 4.5 | 254 | 16 x 16 x 3 | Circular | 116 |
| DOE-SCAN-1064-163C | 1064 | 5.0 | 163 | 25.4 x 3.0 | Circular | 118 |
| DOE-SCAN-9.4-100 | 9400 | 12.0 | 100 | 25.4 x 3.0 | Rectangular | 150 x 200 |
Diffractive Beam Splitters
The collimated laser light is incident onto an array (1 x N or M x N) of Beam Splitter DOE to split the input beam into N beams. The N output beams make some separation angle with the Beam Splitter DOE and there exists the desired zero-order beam for an odd number of beams (N). The focusing lenses are often used to achieve the output at the desired working distance.
Material: Fused Silica
Beam Mode: SM or MM
Separation Angle: ≤ 5°
Transmission Efficiency: ̴ 100%Overall Efficiency ̴ 74- 85%
Uniformity (Contrast): < 1-3%
Zero-Order: relative to the incident beam<0.5-1%
Type: Window
Coating: AR/AR @ 355nm, 532nm, 1064nm
| Part No. | Wavelength (nm) | Dia (mm) | Thickness (mm) | Separation Angle | No. of Spots |
|---|---|---|---|---|---|
| DOE-355-1x3 *NEW* | 355 | 25.4 | 3 | 0.0053˚ | 3 |
| DOE-355-1x4 *NEW* | 355 | 25.4 | 3 | 0.048˚ | 4 |
| DOE-355-1x8 *NEW* | 355 | 25.4 | 3 | 0.048˚ | 8 |
| DOE-532-1x8 *NEW* | 532 | 25.4 | 3 | 0.323/0.232/0.224˚ | 8 |
| DOE-1064-1x4 *NEW* | 1064 | 15.0 | 3 | 1.15˚ | 4 |
| DOE-1064-1x8 *NEW* | 1064 | 25.4 | 3 | 0.646/0.464/0.449˚ | 8 |
DOE Applications
DOE Related Articles
Diamond Turned Optics: Precision Manufacturing for Advanced Optical Systems
Medical optics is revolutionizing healthcare by integrating advanced optical technologies into a wide array of medical devices. These technologies are critical for diagnostics, treatment, and...
Read more
DOE are added to laser systems to control the incident beam’s phase and amplitude, to ‘shape’ the beam to a desired output pattern with distinctive...
Read more
In laser optics, diffractive optical elements (DOEs) are designed to transform collimated Gaussian beams into a desired output pattern.
Read more
Medical optics is revolutionizing healthcare by integrating advanced optical technologies into a wide array of medical devices. These technologies are critical for diagnostics, treatment, and...
Read more
Acousto-optic deflectors (AODs) are essential components in modern optical systems, offering high-speed, precise beam steering capabilities. These devices exploit the interaction between sound waves and...
Read more
The Role of Semiconductor Optics: Laser and Imaging Technologies in Semiconductor Equipment
To simultaneously melt the materials on both sides of the interface and establish a high-strength micro-region bond, the laser focal point needs to be precisely...
Read more
