Spherical Lens Parameters Transmission of Various

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Page 698
Optics
Optical Systems
Spherical Lens Parameters
Free Space Isolators
E-O Devices
Spherical Singlets
Multi-Element
Lenses
Cylindrical Lenses
Aspheric Lenses
Mirrors
Diffusers
& Lens Arrays
Windows
Prisms
Ø = Lens Diameter
1= 1 + 1
Paraxial Lens Formula (assumes sin θ ≈ θ)
f S S'
Gratings
Polarization Optics
M = S' Magnification or Conjugate Ratio
S
S = Object Distance, positive for objects to the left
f = EFL (Effective Focal Length)
of the front principal point P.
Beamsplitters
S' = Image Distance, positive for images to the right of the rear
rear principal point P'
Filters
& Attenuators
Gas Cells
Transmission of Various Materials
GLASS
BK7
DESCRIPTION
BK7 is a high-quality optical glass
commonly used to make lenses
intended for laboratory use. It has
excellent mechanical and optical
properties as well as good transmission
in the visible and IR.
TRANSMISSION
1mm Thick
Sample
350nm to 2.0µm
Surface
Reflections
Included
UV Fused Silica Transmission
UV Fused Silica UV fused silica is an excellent material
185nm to 2.1µm
for the transmission of UV light. It is
durable and has good mechanical properties
Texternal ≥ 80%/cm @ 185nm
Tinternal ≥ 88%/cm @ 185nm
CaF2
MgF2
698
www.thorlabs.com
Calcium fluoride provides great
transmission from the UV to the IR.
Synthetic CaF2 is used to improve deep
UV transmission and to increase the
damage threshold.
180nm to 8.0µm
Magnesium fluoride, an extremely
rugged and durable material, is
transparent over an extensive range
of wavelengths from the UV to the IR.
200nm to 6.0µm
1mm Thick
Sample
Surface
Reflections
Included
1mm Thick
Sample
Surface
Reflections
Included
1mm Thick
Sample
Surface
Reflections
Included
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Optics
GLASS
SF11
Ge
ZnSe
Si
Optical Systems
DESCRIPTION
TRANSMISSION
This glass provides excellent chemical
resistance and has a high refractive index,
which allows for the same amount of
refraction with less curvature. It is useful
for constructing optics that would be
extremely difficult to make from BK7.
420nm to 2.3µm
The transmission characteristics of
germanium in the IR region of the
spectrum make it an ideal choice
for imaging 2.0 - 16µm light.
Ge plano-convex lenses are particularly
well suited for more biomedical
and military imaging applications.
2.0µm to 16µm
Free Space Isolators
E-O Devices
Surface
Reflections
Included
Spherical Singlets
Multi-Element
Lenses
1mm Thick Sample
Cylindrical Lenses
Aspheric Lenses
Mirrors
Diffusers
& Lens Arrays
Surface Reflections Included
With a transmission range from 600nm - 600nm to 16µm
16µm, zinc selenide plano-convex lenses are
ideal for IR applications. Due to the low
absorption coefficient, these lenses are also
particularly well suited for high-power CO2
laser applications. In contrast to Ge and Si,
which also transmit in this spectral range,
ZnSe transmits some visible light, thereby
allowing for visual alignment of the optic.
Silicon plano-convex lenses are an ideal
choice for applications from 1.2 - 8µm
and are particularly well suited for
imaging, biomedical, and military
applications.
1mm Thick
Sample
Windows
1mm Thick Sample
Prisms
Gratings
Polarization Optics
Surface Reflections Included
Beamsplitters
Filters
& Attenuators
1200nm to 8.0 µm
1mm Thick Sample
Gas Cells
Surface Reflections Included
Spherical Singlet Anti-Reflection Coatings
Most of our standard optics are available with
high-performance, multilayer AR coatings, which
minimize surface reflections within the specified
wavelength ranges. These coatings are designed
for angles of incidence between 0° and 30° (0.5
NA). For optics intended to be used at large
■
■
■
R < 0.5% Average Over Band at 0° Incidence
Less Angular Sensitivity within Angular Range
Frequently Run Coatings are Listed Below
angles, consider using a custom coating optimized at a 45° of incidence; these
coatings are effective from 25° to 52°. The plot shown below indicates the
performance of the standard coatings in this family as a function of wavelength
for a single surface. Broadband coatings have a typical absorption of 0.25% that
is not shown in the reflectivity plots.
Normal Incidence Broadband Multilayer Anti-Reflective Coating
COATING
CODE
-UV
-A
-B
-C
WAVELENGTH
RANGE
290-370nm
350-650nm
650-1050nm
1050-1620nm
DESIGN ANGLE
OF INCIDENCE
0°
0°
0°
0°
USEFUL ANGLE
OF INCIDENCE
0 to 30°
0 to 30°
0 to 30°
0 to 30°
(nm)
www.thorlabs.com
699
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Page 703
Optics
CaF2 Vacuum UV: Plano-Convex Lenses
Optical Systems
Free Space Isolators
Specifications
■
■
■
■
■
Material: Vacuum Grade CaF2
Wavelength Range:
180nm to 8.0µm Uncoated
Dia. Tolerance: +0.00/-0.10mm
Focal Length Tolerance:
±1% @ 248nm
E-O Devices
Scratch-Dig: 40-20
Centration: 3arcmin
Clear Aperture: 90% of Dia.
Design Wavelength:
588nm (n = 1.43388)
Coating: None
■
■
■
■
Spherical Singlets
Multi-Element
Lenses
Cylindrical Lenses
Aspheric Lenses
Plano-Convex Lenses: Material CaF2
ITEM #
DIA
(mm)
f
(mm)
LA5315
LA5183
LA5458
LA5370
LA5763
LA5042
LA5817
LA5012
LA5714
LA5255
LA5464
LA5956
LA5835
12.7
12.7
12.7
25.4
25.4
25.4
25.4
25.4
25.4
25.4
25.4
25.4
25.4
20.0
50.0
80.0
40.0
50.0
75.0
100.0
150.0
200.0
250.0
500.0
750.0
1000.0
tc
te1
RMB
R
(mm)
(mm)
(mm)
fb
(mm)
935.90
955.00
859.50
1,384.80
1,480.30
1,766.80
878.60
974.10
983.70
1,174.70
926.40
974.10
955.00
8.7
21.7
34.7
17.4
21.7
32.5
43.4
65.1
86.8
108.5
216.9
325.4
433.9
4.3
2.5
2.1
7.5
6.1
4.6
3.9
3.3
2.9
2.7
2.4
2.2
2.2
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
17.0
48.3
78.5
34.8
45.7
71.8
97.3
147.7
198.0
248.1
498.3
748.4
998.5
PRICE
$
$
$
$
$
$
$
$
$
$
$
$
$
$
98.00
100.00
90.00
145.00
155.00
185.00
92.00
102.00
103.00
123.00
97.00
102.00
100.00
€
£
£
£
£
£
£
£
£
£
£
£
£
£
£
€
€
€
€
€
€
€
€
€
€
€
€
€
61.70
63.00
56.70
91.40
97.70
116.60
58.00
64.30
64.90
77.50
61.10
64.30
63.00
91,10
93,00
83,70
134,90
144,20
172,10
85,60
94,90
95,80
114,40
90,20
94,90
93,00
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
¥
SUGGESTED
MOUNT2
Mirrors
Diffusers
& Lens Arrays
Windows
LMR05
Prisms
Gratings
LMR1
Polarization Optics
Beamsplitters
Filters
& Attenuators
1) Edge thickness given before 0.2mm @ 45° typical chamfer
2) See the Lens Mount Section, Starting on Page 153.
Gas Cells
Magnesium Fluoride: Plano-Convex Lenses
With a transmission window from 200nm to 6µm, Vacuum Grade UV MgF2 is an
ideal material for many biological and military imaging applications. Magnesium
Fluoride is extremely durable in comparison to other materials that are transparent
from the UV to the IR. The C-axis of the MgF2 crystalline structure is oriented to
minimize birefringence.
■
Specifications
■
■
■
Average Transmission >90% from
200nm to 6µm
■
■
Material:
Vacuum Grade UV MgF2
Wavelength Range:
200nm to 6µm Uncoated
Dia. Tolerance: +0.00/-0.10mm
Center Thickness Tolerance:
±0.2mm
■
■
■
■
■
Focal Length Tolerance:
±2% @ 633nm
Scratch-Dig: 40-20
Centration: 3arcmin
Clear Aperture: 90% of Dia.
Alignment to C-Axis:
<20arcmin
Coating: None
Plano-Convex Lenses: Material MgF2
ITEM #
DIA
(mm)
LA6002
LA6003
LA6004
LA6005
LA6006
LA6007
LA6008
LA6009
LA6010
25.4
25.4
25.4
25.4
25.4
25.4
25.4
25.4
25.4
FOCAL LENGTH (mm)
200nm 486nm 633nm 2.0µm
44.6
53.3
66.8
89.3
133.7
178.2
222.8
445.5
891.1
49.6
59.4
74.4
99.4
148.7
198.3
247.9
495.8
991.6
50
60
75
100
150
200
250
500
1000
51.2
61.4
76.9
102.8
153.7
205.0
256.2
512.5
1024.9
PRICE
$
$
$
$
$
$
$
$
$
$
333.00
307.00
291.00
270.00
250.00
239.00
229.00
218.00
213.00
€
£
£
£
£
£
£
£
£
£
£
209.80
193.40
183.30
170.10
157.50
150.60
144.30
137.30
134.20
€
€
€
€
€
€
€
€
€
309,70
285,50
270,60
251,10
232,50
222,30
213,00
202,70
198,10
¥
¥
¥
¥
¥
¥
¥
¥
¥
RMB
R
(mm)
3,180.20
2,931.90
2,779.10
2,578.50
2,387.50
2,282.50
2,187.00
2,081.90
2,034.20
18.9
22.6
28.3
37.8
56.6
75.4
94.3
188.5
377.0
tc
te1
(mm) (mm)
6.9
6.0
5.0
4.3
3.2
3.2
2.8
2.6
2.4
2.0
2.1
2.0
2.1
1.8
2.1
1.9
2.2
2.2
fb
(mm)
SUGGESTED
MOUNT2
45.0
55.5
71.4
97.1
147.7
197.7
248.0
498.1
998.3
LMR1
1) Edge thickness given before 0.2mm @ 45° typical chamfer.
2) See the Lens Mount Section, Starting on Page 153.
www.thorlabs.com
703