www.gmp.ch
46 Gratings, graticules and apertures
9.1 Diffraction gratings
Our research range of high-quality replica
reflection gratings includes both ruled
and holographic types. Generally ruled
gratings have higher efficiency,while
holographics have lower stray-light levels
and are available in closer rulings. For the
UV,however,blazed holographics are
available with a similar profile and
efficiency to ruled types. Efficiency curves
are available on request.
The commercial range are inexpensive
transmission replicas mounted between
glass plates and are suitable for simple
demonstrations etc.
Research range – ruled
Catalogue No.
600
600
600
600
1200
1200
1200
9
Lines/
mm
Blaze
(nm)
DG 300
600 300
DG 500
600 500
DG 1000 600 1000
DG 1600 600 1600
DG 250 1200 250
DG 500 1200 500
DG 750 1200 750
Options available
Research range: Other wavelengths, sizes
and coatings, transmission types etc.
available to order.
Data for calculation
Light of wavelength λ incident at an angle i
will be diffracted at angles i’ given by:
sin i’ = Gnλ – sin i
where G = groove density (lines/mm) and n is
the order of diffraction (any integer). Blazed
gratings have facets inclined at an angle b to
the surface to concentrate light into the first
order (n = +1). When the grating is used in the
Littrow condition (retroreflection, i = i’) peak
efficiency will be near the blaze wavelength
shown (= (2/G) sin b).
DP series
Research range – holographic
Size
(mm)
Catalogue No.
25 x 25 x 9.5
25 x 25 x 9.5
25 x 25 x 9.5
25 x 25 x 9.5
25 x 25 x 9.5
25 x 25 x 9.5
25 x 25 x 9.5
Lines/ Blaze
mm (nm)
Optimised for visible
1200 DI 00
1200
2400 DI 00
2400
–
–
Blazed for UV
1200 DI 240
1200
2400 DI 240
2400
Commercial range
Size
(mm)
Catalogue No. Lines/
mm
25 x 25 x 9.5
25 x 25 x 9.5
100
200
300
600
DP 00
DP 00
DP 00
DP 00
100
200
300
600
Eff. size
(mm)
Size
(mm)
45 x 30
45 x 30
45 x 30
45 x 30
65 x 50
65 x 50
65 x 50
65 x 50
240 25 x 25 x 9.5
240 25 x 25 x 9.5
9.2 Bar gratings and resolution charts
Bar gratings consist of a pattern of equal
bars and spaces formed in chromium on
a glass substrate, commonly used for
moiré, Ronchi and other metrological
techniques.
Resolution charts provide a range of
spatial frequencies for optical testing, and
similarly consist of precision metallic
patterns deposited on a transparent glass
substrate.
1
See also:
Scratch-dig standard
Catalogue
No.
Bar gratings
02 RD 50
08 RD 50
20 RD 50
40 RD 50
50 RD 50
100 RD 50
125 RD 50
Resolution charts
02 RU 50
04 RU 75
06 RU 75
08 RU 50
Lines/mm
Overall
size
(mm)
2
8
20
40
50
100
125
1-228
1-18
1-10
0.46-57
p.2
Fig.
Pattern
50 x 50
50 x 50
50 x 50
50 x 50
50 x 50
50 x 50
50 x 50
–
–
–
–
–
–
–
}
50 x 50
75 x 75
75 x 75
50 x 50
1
2
3
4
USAF 1951, groups 0-7
NBS 1963A (BS 4657)
Cobb chart (BS 1613)
36-sector star 25mm dia.
Bar gratings
with equal
bars and spaces
www.gmp.ch
Stock items:
-too big?
GMP SA Main office: Avenue des Baumettes 17
CH -1020
Renens
try:
-too small?
GMP SA Büro Zürich: Dübendorfstrasse -quite
11a different?
CH-8117 Fällanden
2
3
4
–
See page 1 for more detail
Tél. 021 633 21 21
Fax. 021 633 21 29
info@gmp.ch
Tel. 044 825 34 00
Fax. 044 825 34 01
info@gmp.ch
Gratings, graticules and apertures 47
9.3 Eyepiece and stage graticules
Eyepiece graticules include scales for
measuring linear dimensions, circles for
estimating diameters and radii, and a
protractor for angles. Scales can be
calibrated by comparison with a stage
graticule, supplied in convenient
microscope slide format.
Catalogue No.
Eyepiece graticules
19mm dia.
21mm dia.
See also:
Eyepieces
Microscope tubes
p.21
p.22
00 GG 19
02 GG 19
–
05 GG 19
06 GG 19
00 GG 21
02 GG 21
–
05 GG 21
06 GG 21
07
08
10
12
07
08
10
12
GG 19
GG 19
GG 19
GG 19
320
40
30
40
50
60
70
80
90
100
50
40
30
20
10
10
10
20
1
10
10
cross lines
cross lines
scale 1mm in 0.01mm divisions
scale 5mm in 0.05mm divisions
scale 10mm in 0.1mm divisions
10
10
10
5/10
crossed scales 10mm/0.1mm div.
grid 10 x 10mm of 0.1mm squares
protractor 10mm dia.
circles 1-16mm dia.
–
–
–
–
330
350
340
0
10
20
30
50
60
70
290
10
20
30
40
50
10
80
280
270
90
260
100
250
20
110
120
240
30
130
230
40
220
50
07 GG --
05 GG --/ 06 GG --
Pattern
40
300
20
20
–
–
11 GG 76
05 GG 76
06 GG 76
310
30
10
Line
width
(µm)
GG 21
GG 21
GG 21
GG 21
50
0
Catalogue No.
Stage graticules
76 x 25mm
210
200
190
180
170
160
150
140
10 GG --
12 GG --
9.4 Iris diaphragms
Iris diaphragms are commonly used in
optical systems to control light-throughput
or f/number. The diaphragms in our range
have blackened brass bodies and
blackened steel leaves. The IZ fully closing
Catalogue No.
Maximum
aperture
(mm)
Minimum
aperture
(mm)
Outside
diameter
(mm)
Thickness
(mm)
Pin
length
(mm)
Number of
leaves
05
08
12
15
18
IC 10
IC 15
IC 20
IC 24
IC 28
5
8
12
15
18
0.7
0.7
0.8
0.8
0.8
10
14.8
19.8
24
28
4.5
4.5
5.0
5.0
5.0
10
10
11
10
12
6
8
10
12
12
20
22
25
28
34
IC 30
IC 33
IC 37
IC 40
IC 49
20
22
25
28
34
0.8
0.8
0.8
1.2
1.0
30
33
37
40
49
5.5
5.5
5.5
5.5
6.5
12
12
12
12
12
12
14
14
16
14
37
42
50
58
75
IC 53
IC 58
IC 70
IC 80
IC 100
37
42
50
58
75
1.2
1.2
2
3
4
53
58
70
80
100
6.0
6.5
7.5
8.0
9.0
12
12
12
12
15
16
18
16
18
20
120 IC 165
225 IC 300
120
225
30
30
18
18
11
13
13
10
14
16
6
12
165
300
0
0
0
21
38
54
15
18
Fully closing iris diaphragms
12 IZ 21
25 IZ 38
37 IZ 54
12
25
37
9
types have two sets of leaves that overlap
on closing thus completely blocking the
beam. As the sets of leaves are
longitudinally separated, these are best
used with well-collimated light.
See also:
6
6
7.5
Sales
Technical
Fax
Email
UK/Europe/Rest of world
+44 (0)1223 866120
+44 (0)1223 866130
+44 (0)1223 866125
mail@comarinstruments.com
TubeMount iris diaphragms
Iris diaphragms in holders
(post-mounted)
Sales
Technical
Fax
Email
p.58
p.84
The Americas
1 866 40 COMAR (26627)
1 306 522 1515
1 306 781 6006
solutions@comaroptics.com
48 Gratings, graticules and apertures
9.5 Precision apertures
Our precision apertures are prepared in
copper foil by an electroforming process,
which allows very precise control of size
and shape, and thins the substrate
around the aperture leaving a sharp welldefined edge.
The foil is blacked one side to reduce
reflections. Pinholes are supplied in
mounts 16mm dia. 1.5mm thick; slits are
unmounted foils 10mm dia.
Pinholes (in 16mm mount)
Catalogue No.
Aperture
dia. (µm)
Slits (unmounted 10mm foils)
Foil thickness
(µm)
Catalogue
No.
025
04
06
10
16
HP 16
HP 16
HP 16
HP 16
HP 16
2.5
4
6
10
16
± 0.5
± 0.5
± 0.5
± 0.5
±1
9
8
7
8
15
05
10
25
50
100
25
40
63
100
HP 16
HP 16
HP 16
HP 16
25
40
63
100
±1
± 1.5
± 1.5
±2
11
16
7
14
200 HS 10
500 HS 10
Width
(µm)
HS 10
HS 10
HS 10
HS 10
HS 10
Length
(mm)
Foil thick.
(µm)
± 0.5
± 0.5
±1
± 1.5
±2
3
3
5
5
7.5
16
13
17
17
22
200 ± 2.5
500 ± 3
7.5
7.5
22
22
5
10
25
50
100
Specification
Circularity/straightness:*
<25µm
25-63µm
100µm
>100µm
0.5µm
1µm
1.5µm
2µm
Centration:*
To foil edge
To mount
20µm
100µm
*Manufacturer’s data
9.6 Standard and high-power apertures
withstand 100-200MW/cm2 for a 10ns
pulse (700nm). Thickness is 0.15mm,
thinned to 25µm around the aperture.
These apertures are laser-drilled in discs
9.53mm dia. and are available
unmounted or in two mount sizes.
9
The standard range are in 302 stainless
steel 12.5µm thick, except the 1µm and
2µm which are in a 2.5-5µm patch on an
0.1mm backing.
High power apertures are in copper,gold
plated on one side, flat poly black (98%
emissivity) on the other,and typically
Specification
Centration:*
To foil edge
To mount
Pinhole roundness:*
1-15µm
20-50µm
≥75µm
Slit straightness*
Options available
• Special sizes and mounts
• Black one or both sides
• Closer tolerance or calibration
• Thicker substrate (0.15mm)
Catalogue No.
Mounted
16mm dia.
Catalogue No.
Mounted
25mm dia.
0.5µm
1µm
2µm
2µm
*Manufacturer’s data
Standard series pinholes
Catalogue No.
Foil
9.53mm dia.
50µm
150µm
Standard series slits
Aperture
dia.
(µm)
Catalogue No.
Foil
9.53mm dia.
01
02
03
05
10
HL 10
HL 10
HL 10
HL 10
HL 10
01
02
03
05
10
HL 16
HL 16
HL 16
HL 16
HL 16
01
02
03
05
10
HL 25
HL 25
HL 25
HL 25
HL 25
1 +0.5, -0
2 ± 0.5
3 ± 0.5
5±1
10 ± 1
025
05
10
25
50
HM 10
HM 10
HM 10
HM 10
HM 10
15
20
25
35
50
HL 10
HL 10
HL 10
HL 10
HL 10
15
20
25
35
50
HL 16
HL 16
HL 16
HL 16
HL 16
15
20
25
35
50
HL 25
HL 25
HL 25
HL 25
HL 25
15 ± 1.5
20 ± 2
25 ± 2
35 ± 2
50 ± 3
100 HM 10
75
100
150
200
300
HL 10
HL 10
HL 10
HL 10
HL 10
75
100
150
200
300
HL 16
HL 16
HL 16
HL 16
HL 16
75
100
150
200
300
HL 25
HL 25
HL 25
HL 25
HL 25
75 ± 3
100 ± 4
150 ± 6
200 ± 6
300 ± 8
400
600
800
1000
HL 10
HL 10
HL 10
HL 10
400
600
800
1000
HL 16
HL 16
HL 16
HL 16
400
600
800
1000
HL 25
HL 25
HL 25
HL 25
400 ± 10
600 ± 10
800 ± 10
1000 ± 10
Catalogue No.
Mounted
16mm dia.
025
05
10
25
50
Catalogue No. Slit
Mounted
length
25mm dia.
(mm)
HM 16
HM 16
HM 16
HM 16
HM 16
025 HM 25
05 HM 25
10 HM 25
25 HM 25
50 HM 25
1
3
3
3
3
100 HM 16
100 HM 25
3
Slit
width
(µm)
2.5 +1,-0.5
5±1
10 ± 1
25 ± 2
50 ± 2
100 ± 4
High power pinholes
Catalogue No.
Foil
9.53mm dia.
05
10
25
50
100
HG 10
HG 10
HG 10
HG 10
HG 10
Catalogue No.
Mounted
16mm dia.
05
10
25
50
100
HG 16
HG 16
HG 16
HG 16
HG 16
www.gmp.ch
Stock items:
-too big?
GMP SA Main office: Avenue des Baumettes
Renens
-too17
small? CH -1020try:
-quite different?
GMP SA Büro Zürich: Dübendorfstrasse 11a
CH-8117 Fällanden
–
Catalogue No.
Mounted
25mm dia.
05
10
25
50
100
HG 25
HG 25
HG 25
HG 25
HG 25
Aperture
dia.
(µm)
5±1
10 ± 1
25 ± 2
50 ± 3
100 ± 4
See page 1 for more detail
Tél. 021 633 21 21
Fax. 021 633 21 29
info@gmp.ch
Tel. 044 825 34 00
Fax. 044 825 34 01
info@gmp.ch
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising