GTube Lens Block A10859 Series
LA10859
LA10859-01
Transmittance (Typical)
These are video lens blocks for use with the infinity-corrected objective
lenses. It has a tube lens with a focal length of 100 mm to form an
image. One side has a male C-mount thread, and the other side has a
female C-mount thread. You can attach a device such as an ICCD or
CCD camera to the side with the male thread.
You can use a C-mount double male thread ring to connect the side
with the female thread to the A10858 stage block.
The tube lens block reduces aberration through the use of an
achromatic lens.
TPMOB0251EA
100
80
60
40
20
0
SPECIFICATIONS
Recommended
Type No.
A10859
A10859-01
Focal Length Effective Beam Size
Weight
Sensor Size
15 mm
100 mm
1/3 inches or less Approx. 130 g
1/2 inches or less Approx. 205 g
300
400
500
600
700
800
900
1000
24 mm
WAVELENGTH (nm)
* Supplied: C-mount double male thread ring.
* Designed for wavelength from 400 nm to 700 nm.
Dimensional Outlines (Unit: mm)
A10859
A10859-01
MANUAL
FOCUSING RING
CAMERA ANGLE
ADJUSTING SCREW*
CAMERA ANGLE
ADJUSTING SCREW*
MANUAL
FOCUSING RING
C-MOUNT (FEMALE)
C-MOUNT (FEMALE)
C-MOUNT (MALE)
C-MOUNT (MALE)
IMAGE PLANE
IMAGE PLANE
4
4
4
4
93 (92-94)
17.526
96 (95-97)
17.526
TPMOA0052EA
* You can adjust the camera tilt by loosening this screw and turning the tube lens block.
TPMOA0053EA
Technical Guide
Imaging Lens
Distance Between the Imaging Lens and the Objective Lens
The light from the sample is collimated by the infinity-
corrected objective lens before it enters the imaging lens.
The imaging lens focuses the image on the focal point.
Even though the beam of light that passes from the infinity-corrected
objective lens to the imaging lens is collimated, the distance between the
lenses must still be kept below a certain limit. This limit (L) can be
calculated from the specifications of the objective and imaging lenses and
the effective area of the sensor.
COLLIMATED
LIGHT BEAM
CAMERA
where φ1 is the objective lens's exit pupil
diameter (mm), f1 is the focal length (mm), NA
is the numeric aperture, φ2 is the imaging lens
effective diameter, f2 is the focal length (mm),
φ is the effective sensor area, and d is the
observation area.
f2(φ2 – φ1)
L (mm) =
φ
INFINITY-CORRECTED
OBJECTIVE LENS
IMAGING LENS
φ1 = 2 × f1 × NA
TUBE LENS BLOCK
A10859 / A10859-01
TPMOC0224EA
φ
d =
Magnification
M
You can calculate the magnification from the imaging lens
focal length (100 mm) and the focal length of the
microscope's objective lens.
To avoid vignetting when using the A10859 with objective lens (f1 = 18
mm, NA = 0.25) and a 1/3-inch video camera (φ = 6 mm), keep the
distance from the objective lens to the A10859 below 100 mm. At this
distance, placing a dichroic mirror between the objective lens and the
A10859 will not have much of an effect on the overall optical
characteristics.
Imaging lens focal length
Objective lens focal length
100
Magnification (M) =
=
Objective lens focal length
Example: When the objective lens focal length is 45 mm, the
magnification is approximately 2.2 times.
15
HAMAMATSU [ HAMAMATSU CORPORATION ]
