Home
¡¡
Beam homogenizing tolerant to incident beam size and beam quality
A laser beam with a top-hat uniform intensity distribution is desired in many applications. A top-hat beam is also called a flat-top beam or a super-Gaussian beam.
Basically we have 4 different solutions to homogenize a laser beam, i.e.
(1) flat-top beam shaping for a Gaussian beam with a specific beam size and good beam quality
(2) Beam homogenizing tolerant to incident beam size and beam quality
(3) beam homogenizing with speckles, tolerant to incident beam size and beam quality
(4) beam homogenizing for incoherent beams with microlenses
The diffractive optical elements (DOEs)
designed based on our first approach are sensitive to
the incident laser beam. Specifically,
1. The incident laser beam should be of Gaussian distribution.
2. The DOE has to be placed at the waist
of the incident laser beam.
3. The incident beam spot
size on the DOE should be
the same as the designed value.
4. The lateral alignment should be accurate.
If all these four conditions are satisfied, the DOEs' performance will be good, otherwise one cannot obtain the desired flat-top output beam. By contrast, the DOEs designed based on the second approach are very tolerant to incident beam size and beam quality, without lateral or longitudinal alignment requirements.
The products that you are reading were designed and fabricated based on the second approach of homogenizing an incident laser beam.
|
Item Number |
DOE receiving size |
Wavelength |
Diffaction angle |
Description | |
| T-RD-50-18mm-1600mm-532 | 50 | 532 | 11.25 mrad£¨Fixed working distance) | Datasheet |
New arrival on 2019.4.23 |
| SFH-RD-12p5-25DEG-785 | 12.5 x 12.5 mm | 785 nm | 25 degree | £¨Internal Reference 73£© | |
| SFH-RD-12.5-25DEG-785-S | 12.5 x 12.5 mm | 785 nm | 25 degree | Collimation of incident laser beam is not required | £¨Internal Reference 81£© |
| SFH-REC-10-83p25x83p25mrad-532 | 10x10 mm | 532 nm |
83.25 x
83.25 mrad |
Equivalent to 0.333x0.333mm @ 4 mm working distance |
New arrival on 2016.11.2.£¨Internal Reference 107£© |
| SFH-REC-50-4p3x11mrad-1064 | ¦µ50 mm | 1064 nm | 4.3x11mrad | Equivalent to 1.3x3.3mm @ 300 mm working distance |
|
| SFH-REC-50-2x5p3mrad-1064 | ¦µ50 mm | 1064 nm | 2x5.3mrad | Equivalent to 0.6x1.6mm @ 300 mm working distance | |
| SFH-REC-50-20x20mrad-1064 | ¦µ50 mm | 1064 nm | 20x20mrad | Equivalent to 6x6mm @ 300 mm working distance |
. |
| SFH-REC-25-10mrad-1064 | ¦µ25 mm | 1064 nm | 10mrad | Equivalent to 3x3mm @ 300 mm working distance |
New arrival on 2016.5.9. (Internal reference£º112) |
| SFH-RD-50-20mrad-1064 | ¦µ50 mm | 1064 nm | 20mrad | Equivalent to 6 mm in diameter round output spot @ 300 mm working distance |
|
| SFH-REC-30-p5xp5mrad-1064 | 30 x 30 mm | 1064 nm | 0.5x0.5 mrad | Equivalent to a 30x30 micron output spot @ 60 mm working distance |
Arrival on 2015.9.10. (Internal reference£º62) |
| SFH-REC-12-p15xp45mrad-355 | 12 x 12 mm | 355 nm |
0.15x0.4 mrad |
Equivalent to a 20x60 micron output spot @ 134 mm working distance | |
|
SFH-REC-25-p15xp45mrad-355 |
25 x 25 mm |
355 nm |
0.15x0.45 mrad |
Equivalent to a 20x60 micron output spot @ 134 mm working distance | |
|
SFH-REC-18-4mrad-355 |
18 x 18 mm |
355 nm |
4x4 mrad |
||
|
SFH-REC-18-5p2mrad-355 |
18 x 18 mm |
355 nm |
5.2x5.2 mrad |
||
| SFH-REC-12-p45x1p35mrad-1064 | 12 x 12 mm | 1064 nm |
0.45x1.35 mrad |