Download PV500 Training Text (Basic Course)

2.7 View Range Setting
For this training, we use the lens of f=25mm and set the vertical view range to 50mm. Now, make a setting
of view range.
Excerption of the view range table for 2-mega-pixel digital camera
„
Lens
View range
(mm)
ANPVL502
f=50mm
ANPVL252
f=25mm
10
12.5
15
20
30
13.3
16.7
20.0
26.7
40.0
115
139
163
210
305
40
53.3
399
7
172
Adapter
WD
ring
13
11
9
7
2(*2)
74
2(*3)
104
50
66.7
494
5
219
2(*4)
Ver.
Hor.
WD
Adapter
ring
26
21
18
13
9
30
41
53
77
124
ANPVL162
f=16mm
WD
135
Adapter
ring
2(*5)
Resolution
µm/pixel
Ver.
8.3
10.4
12.5
16.7
25.0
Hor.
8.3
10.4
12.5
16.7
25.0
2
33.3
33.3
1.5
41.7
41.7
*2: Le ns focal point is around the closest position
*3: Le ns focal point is around 0.5
*4: Lens focal point is around 1
*5: Lens focal point is around 3
WD: The distance from the front of the lens to the object
*: Lens focal point differs from the others.
„
Exercise 1
Set a vertical view range to 10mm by referring to the
values of “WD” and “Adapter ring” in the view range
table to capture an image.
The view range table lists WD = 30mm and Adapter
ring = 13mm for the 10mm vertical view range with an f
= 25mm lens. A set of adapter rings consists of the rings
of the following thickness; 40mm, 20mm, 10mm, 5mm,
1mm, and 0.5mm. Combine them to make
13mm-thickness.
The camera or the lens and a 10mm-ring can be screwed
each other to fix. However, you cannot screw them if
rings of over 2mm are between them.
Therefore, insert rings of 1mm between the camera and
a 10mm-ring, and another ring of 2mm between the
10mm-ring and the lens, to make the total thickness of
13mm.
„
Exercise 2
Set a vertical view range to 50mm by referring to the
values of “WD” and “Adapter ring” in the view range
table to capture an image.
The view range table lists WD = 219mm and Adapter
ring = 2mm for the 50mm vertical view range with an f
= 25mm lens.
(The focal point is around 1.）
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