What is M95 and why M95?
M95 objective lenses have total parfocal length of 95mm and mainly used with metallurgical or industrial microscopes. This is why they are called M95. FYI, regular objective lenses in biological and metallurgical microscopes are mainly M45 (45m mm parfocal length), while there is M60 also available for some applications.
The M95 are excellent choices for long working distance microscopy optics. They have great combination of long working distance and resolution at the same time. These lenses use mainly foal length of 200mm which is written on the lens enclosure.
These lenses can easily replace Mitutoyo lenses. They use the same thread of M26.
M95 Plan APO Objectives for Metallurgical/Industrial Microscopes, Visible, NIR and NUV
The M95 objective lenses are offered at different wavelengths:
- a) Visible (VIS) range (400-700nm)
- b) Near Infrared (NIR) range (650-800nm) which are also suitable for VIS range
- c) Near Ultraviolet range (200-400nm), which can also be used for VIS range Plan Apo 20
a) NUV Range
Name (objectives)
|
Magnification
|
Numerical aperture(N.A)
|
Working distance (mm)
|
Conjugate distance(mm)
|
Parfocalization
distance(mm)
|
Infinity M Plan APO HL Objective (NUV)
|
20X
|
0.40
|
17.15
|
∞
f T=200
|
95
|
50X
|
0.43
|
14.81
|
50X
|
0.70
|
3.50
|
b) VIS Range
Name (objectives)
|
Magnification
|
Numerical aperture (N.A)
|
Working distance (mm)
|
Conjugate distance (mm)
|
Parfocalization
distance (mm)
|
Infinity M95 Plan APO SL Objective (Visible)
|
2X
|
0.055
|
34.60
|
f=200
|
95
|
5X
|
0.14
|
44.50
|
∞
f T=200
|
95
|
10X
|
0.28
|
34.00
|
20X
|
0.29
|
31.00
|
50X
|
0.42
|
20.50
|
100X
|
0.55
|
12.50
|
c) Near Infra Red (NIR) Obj lenses
Name |
Magnification |
N.A. |
W.D.(mm) |
Focus |
Depth of Field (μm) |
Resolution |
Length (mm) |
(μm) |
M95 Long
Working
Distance
Infinity Plan Apo NIR
Objective |
2x |
0.055 |
34.6 |
100 |
91 |
5 |
5x |
0.14 |
45 |
40 |
14 |
2 |
10x |
0.28 |
34 |
20 |
3.5 |
1 |
20x |
0.29 |
30.8 |
10 |
3.5 |
1 |
50x |
0.42 |
20.5 |
4 |
1.6 |
0.7 |
d) Large-field industrial obj lenses
These are an unusual 0bjective lenses with large field of view size. There are always some special applications that appreciate such an objective lens existence.
Magnification |
Model |
NA |
WD(mm) |
f’ (mm) |
R (μm) |
DF (μm) |
on object
(mm) |
on image
(mm) |
Screw |
1x |
MPlanApo(95)-1X |
0.015 |
14 |
200 |
22 |
148 |
34 |
34 |
M26 |
2x |
MPlanApo(95)-2X |
0.05 |
20 |
100 |
6.67 |
133 |
23 |
46 |
M26 |
5x |
MPlanApo(95)-5X |
0.12 |
22 |
40 |
2.7 |
23 |
10 |
50 |
M26 |
7x |
MPlanApo(95)-7X |
0.22 |
36.4 |
28.57 |
1.25 |
5.7 |
3.6 |
25 |
M26 |
10x |
MPlanApo(95)-10X |
0.3 |
34 |
20 |
1.1 |
3.7 |
4.4 |
44 |
M26 |
10x |
MPlanApo(95)-10XB |
0.3 |
34 |
20 |
1.1 |
3.7 |
4.8 |
48 |
M26 |
20x |
MPlanApo(95)-20X |
0.3 |
33 |
10 |
1.1 |
3.7 |
2.5 |
50 |
M26 |
50x |
MPlanApo(95)-50X |
0.5 |
20.7 |
4 |
0.67 |
1.33 |
1 |
50 |
M26 |
100x |
MPlanApo(95)-100X |
0.8 |
4 |
2 |
0.42 |
0.52 |
0.5 |
50 |
M26 |
150x |
MPlanApo(95)-150X |
0.6 |
4.4 |
1.33 |
0.56 |
0.93 |
0.33 |
50 |
M26 |
200x |
MPlanApo(95)-200X |
0.65 |
2.2 |
1 |
0.51 |
0.79 |
0.25 |
50 |
M26 |
250x |
MPlanApo(95)-250X |
0.7 |
2 |
0.8 |
0.48 |
0.68 |
0.2 |
50 |
M26 |
500x |
MPlanApo(95)-500X |
0.75 |
1.96 |
0.4 |
0.44 |
0.59 |
0.1 |
50 |
M26 |
e) High Numerical Aperture NA and High Resolution NIR APO Objectives
NAME |
N.A. |
W.D.
(mm) |
f′
(mm) |
R
(μm) |
±Δp |
VISUAL FIELD
(mm/φ) |
VISUAL FIELD
(mm/1/2CCD) |
TRANSMITTANCE |
(μm) |
REMARK |
NIR Plan
Apo 20X |
0.45 |
16.7 |
10 |
0.61 |
1.36 |
Φ1.2 |
0.24×0.32 |
450nm-700nm >70%,
770nm~790nm>90%Achromatic
Wavelength:780nm |
NIR Plan
Apo 50X |
0.8 |
3.34 |
4 |
0.34 |
0.43 |
Φ0.48 |
0.10×0.13 |
450nm~700nm>70%,
770nm~790nm>90%Achromatic
Wavelength:780nm |
NIR Plan
Apo 50X |
0.67 |
10 |
4 |
0.7 |
1.6 |
Φ0.48 |
|
450nm~700nm>70%,
770nm~790nm>90%Achromatic
Wavelength:780nm |
Large Field Application
We have designed a special imaging module to get the largefield of view of 4mmx4mm, at 1.25um resolution, with both reflected illumination or transmitted light. The below image was taken using reflected light. The beads are at 16.8um size.
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