Illumination
Flat Top Projector
Features
• Very efficient all glass
optics
• Achromatic (from UV to
near IR)
• Very smooth low ripple
uniformity profile with no
high frequency noise
• Uniformity coefficient of
variation of better than 1%
achievable
• High aspect ratios available
off the shelf
• High uniformity edge
steepness
Applications
• Flow cytometry
• Confocal microscopy
• DNA sequencing
• LIF & Scattering
• Imaging
• Microscopy
• Micromachining
• Biohazards
• Semiconductor
• Analytics
• Lithography
• Spectroscopy
• CTP
Gaussian to flat-top using refractive beam shaping
optics
S
tockerYale's Flat Top Projector provides true flat top performance with no compromise. It
offers very smooth spatial variations with very low ripple, unlike other technologies that
use overlapping creating unwanted high frequency interference noise.
In combination with conventional optics and StockerYale’s vast array of beam splitting DOEs
a wide variety of patterns can be projected very efficiently. The flat top optics is all glass with
losses due to reflections only. Using AR coatings, efficiencies of over 98% can be achieved
giving you all the power where you want it.
Gaussian (Input)
Flat-Top (Output)
Options
Flat Top Options
Flat-Top 2D
The flat top is a diverging optical element that provides a uniform intensity profile in
the far field. It can be imaged or offered simply as a diverging optical element.
Being cylinder based, it can be readily offered acting on only one axis or crossed pairs
creating the desired aspect ratio for your application.
The dimension of the flat top at the focal plane of an imaging lens, f, is directly
proportional to its effective focal length and can be calculated by:
Horizontal
width
(µm @ 1/e2)
Vertical
width
(µm @ 1/e2)
200
600
FTS (flat top size) = 2 * tan(DIVERGENCE) * ƒ
2
The flat top can be further enhanced by adding StockerYale series of binary phase
beam splitters to create a complex array of flat tops. The beam splitters are highly
stable binary masters etched directly in fused silica offering very low stray light. They
have excellent beam to beam uniformity and have efficiencies in the order of 80%.
Flat-Top 1D
Available Divergences for 1 or 2 dimensional
diverging flat tops
Divergences (± 10%)
Horizontal
width
(µm @ 1/e2)
Vertical
width
(µm @ 1/e2)
60
13
0.2, 0.3, 0.6, 1, 2, 3, 5, 8, 10, 15, 20, 30
Available Focal lengths for the imaged flat
tops option (l >400nm)
Focal length
14, 17.5, 20, 25, 30, 35, 40, 45, 50, 60, 75, 80, 90, 100
Flat-Top Matrix 2D
Note: working distance will be a few mm shorter
Gratings for beam splitting option
Complex flat top patterns can be achieved using our beam splitting option.
Horizontal
width
(µm @ 1/e2)
Vertical
width
(µm @ 1/e2)
Total
4800
Individual
600
Total
5500
Individual
200
Flat-Top Matrix 1D
Horizontal
width
(µm @ 1/e2)
Vertical
width
(µm @ 1/e2)
Total
200
Total
250
Individual
10
The angle between each beam is operating wavelength dependent and can be
found via the grating formula: d sin q = n l (d=period in um, q angle in
degrees, n = diffraction order, 0, +/-1, +/- 2, ….)
2 Beams*
3.33 um, 7.77 um, 26.3 um, 338.6 um
3 Beams
3.33 um, 7.77 um, 26.3 um, 338.6 um
5 Beams
25 um, 169 um
9 Beams
338.2 um, 532 um
11 Beams
25.7 um
15 Beams
16.4 um
19 Beams
50 um
33 Beams
110 um, 426.1 um
99 Beams
260 um
* Zero order minimzed
Flow Cytometry OPtion
StockerYale has been very successful in promoting its flat top for flow
cytometry applications. Our standard flow cytometry option is
available with the following specifications:
Working distance
45 mm
Flat top dimension
60 um@ 1/e2
Gaussian dimension
10 um @ 1/e2
Contained power
>60%
X-AXIS
Y-AXIS
CV uniformity <1% fiber coupled, <1.5% free space
Input Beam Characteristics
Unit
Min
Max
Comments
Dimension
mm
0.5
4
Specified to within 5%, larger input beam available
Wavelength
nm
400
1200
Other wavelengths available, call for information
Gaussian fit
%
97
Mode
Tem00
Divergence
Collimated/Quasi collimated
Output Flat Top Characteristics
High efficiency 1 dimensional flat top uniformity
Contained power typical >85%
High uniformity 1 dimensional flat top uniformity
CV uniformity typical <5%, down to <1% possible
2 dimensional flat top
CV uniformity < ± 20%, contained power
>85%
0.760
0.750
PURE BEAM / FIBER OPTION
PURE BEAM / FIBER OPTION
0.760
0.750
19.30
19.05
Transmission diverging flat top0.750
0.748
FIBER
Transmission SINGLEMODE
focused
LENGHT:
2M flat top
19.05
19.00
SEE NOTE
(A,B,C)
Contained
power >95%
SINGLEMODE FIBER
0.750
0.748
19.05
19.00
SEE NOTE
(A,B,C)
19.30
19.05
LENGHT: 2M
Contained power >90%
FC/APC FIBER CONNECTOR
CLAMPING
SURFACE
FC/APC FIBER
CONNECTOR
Dimensional
diagrams
CLAMPING
SURFACE
PURE BEAM / FIBER OPTION
COLDRAY LASER OPTION
0.760OPTION
COLDRAY LASER
0.750
0.750 0.748
SINGLEMODE FIBER
19.05
19.00
LENGHT: 2M
0.750
0.748
19.05
19.00
SEE NOTE
(A,B,C)
SEE NOTE
(A,B,C)
19.30
1.715
19.05
1.605
43.56
40.77
0.750
0.748
19.05
19.00
FC/APC FIBER CONNECTOR
CLAMPING
SURFACE
CLAMPING
SURFACE
COLDRAY LASER
COLDRAY LASER
1.715
1.605
43.56
40.77
SEE NOTE
(A,B,C)
CLAMPING
SURFACE
COLDRAY LASER OPTION
FREE SPACE OPTION
0.750
0.748
19.05
19.00
1.715
1.605
FREE
43.56
40.77
SPACE OPTION
SEE NOTE
(A,B,C)
0.304
0.294
7.73
7.48
M14 x 0.5 THREAD
X 0.375 [9.50] DEEP.
COLDRAY LASER
CLAMPING
SURFACE
SEE NOTE
(A,B,C)
0.750
0.748
19.05
19.00
NOTE: (A) ADD 1.220 +0.010/-0.010 [31.0 +0.25/-0.25] FOR DIVERGING FLAT-TOP (1D AND 2D)
SPACE OPTION
(B) ADD 3.480 +0.020/-0.020FREE
[88.4 +0.50/-0.50]
FOR FLOW CYTOMETRY FLAT-TOP
(C) ADD 0.890 +0.005/-0.005 [22.6 +0.12/-0.12] FOR FOCUSED FLAT-TOP
0.304
0.294
M14 x 0.5 THREAD
SEE NOTE
7.73
X 0.375 [9.50] DEEP.
(A,B,C)
7.48
0.750
0.304
0.294
7.73
7.48
M14 x 0.5 THREAD
X 0.375 [9.50] DEEP.
SEE NOTE
(A,B,C)
0.750
0.748
19.05
19.00
NOTE: (A) ADD 1.220 +0.010/-0.010 [31.0 +0.25/-0.25] FOR DIVERGING FLAT-TOP (1D AND 2D)
(B) ADD 3.480 +0.020/-0.020 [88.4 +0.50/-0.50] FOR FLOW CYTOMETRY FLAT-TOP
(C) ADD 0.890 +0.005/-0.005 [22.6 +0.12/-0.12] FOR FOCUSED FLAT-TOP
in [mm]
in [mm]
Ordering Parameters
To order, choose: Input Type - Flat Top Type - Beam Splitter Type. E.g., PUR-660-80-DFT-0.3°x0.6°
Input Type
Flat Top Type
Beam Splitter Type
Purebeam Laser Option: StockerYale TEC
fiber coupled single mode laser
Order code: PUR-Wavelength-Power
One Dimensional Diverging Flat Top
Order Code: 1DDFT-diverergence
(ie. 1DDFT-0.3°)
Two Dimensional Diverging Flat Top
Order Code: 2DDFT-divergence 1 x
divergence 2
(ie. 2DDFT-0.3°x2°)
Imaged Flat Top
Order Code: FFT-divergence 1 x
divergence 2 - focal length
(ie. FFT-0.3°x2°-F50)
Order Code: Number of Beams- Period
(ie. 19B-50um)
(i.e. PUR-660-80)
ColdRay Laser Option: StockerYale TEC
Direct Semiconductor free space laser
Order Code: CR-Wavelength-Power
(i.e. CR-640-80)
Free Space Option: M14 threaded holder
Requires Input beam dimension (IBD): 0.5
mm up to 4 mm Gaussian @ 1/e2
Order Code: FS-IBD
(i.e. FS-4)
Fiber Option: FC/PC input end, 2 meters
shielded, NA:0.12,FC/APC exit end.
Requires operating wavelength between
405-830 nm
Order Code: FIB-Operating wavelength
For the flow cytometry option, please contact a StockerYale Application
Engineer at 1-800-814-9552
Information and specifications contained herein are deemed to be reliable and accurate. StockerYale reserves the right to change these specifications at any time without notice.
For sales information:
1-800-814-9552
Corporate Headquarters
32 Hampshire Road
Salem, New Hampshire 03079 USA
Tel.: 603-893-8778 Fax: 603-893-5604
www.stockeryale.com
275 Kesmark
Montreal, Quebec
Canada H9B 3J1
Tel.: (514) 685-1005 Fax: (514) 685-3307
www.stockeryale.com/lasers
lasers@stockeryale.com
For international distributors,
call us, or visit
www.stockeryale.com/laser_distributors
Printed in Canada 08/09
DSM-FLAT-002
(i.e. FIB-640)