CONNECTION EXAMPLES
GConnection Example Using Bifurcated Optical Fiber
Light from a light source is injected into one arm of the bifurcated optical fiber to irradiate a sample or measurement surface.
Fluorescence emitted from the sample or light reflected from the measurement surface is collected by the same optical fiber and then
detected by the PMT module through the other arm of the bifurcated optical fiber.
FILTER BLOCK A10033-xx
ADAPTER BLOCK A10030-01
PMT MODULE
FIBER ADAPTER BLOCK A10037
BANDPASS
LED
FILTER
TPMOC0213EA
GConnection Example Using the Beam Expander Block
The A10031 beam expander block is designed to narrow a 20-mm beam of collimated light to a diameter of 8 mm, the size of the
PMT module's photocathode; however, the expander block's use is not just limited to collimated light, it can also be used to converge
divergent light. For example, if you use the beam expander block to receive the divergent light from an optical fiber, the signal level
will be higher than if you had just used a PMT module.
BEAM EXPANDER BLOCK A10031
ADAPTER BLOCK A10030-01
OPTICAL FIBER
PMT MODULE
DISTANCE L1
DISTANCE L2
<Measurement Conditions>
Light source: Green LED
Optical fiber: NA=0.5. Core diameter=0.98 mm
Detection efficiency (Distance: 50 mm. Detection efficiency measured without beam expander block is normalized to 100.)
DISTANCE (L1, L2)
When Beam Expander is Connected (L1)
When Beam Expander is not Connected (L2)
50 mm
80 %
100 %
90 mm
59 %
59 %
250 mm 350 mm
28 %
13 %
20 %
7 %
TPMOC0214EA
GConnecting to a Microscope
The microscope port is designed so that the image is focused at 17.526 mm from the C-mount attachment location. When you
connect a C-mount adapter to a commercially sold 10-mm C-mount ring (male to female), the approximate location of the image
point is at the PMT module's photocathode (as shown in the figure on the left).
If the light converges to a diameter of 1 mm or less at the image point, do not match the location of the image point to the location of
the PMT module's photocathode; instead, expose the photocathode to a defocused light beam with a diameter of 1 mm or more.
MICRO-
SCOPE
MICRO-
SCOPE
C-MOUNT INTERCHANGEABLE
FILTER BLOCK
A11213-01 (SPACER)
C-MOUNT RING (MALE-FEMALE)
C-MOUNT RING
A9865
C-MOUNT RING
A9865
17.526
17.526
PMT
PMT
MODULE
MODULE
L*
7
10
L*
7
25
* L is the distance from the attached end of the PMT module to the photocathode.
TPMOC0216EA
20
HAMAMATSU [ HAMAMATSU CORPORATION ]
