3.3 Laser-Holographic Complex …
247
The sync pulse is formed with the synchronization system in required phases of
the cardiac cycle in moments of time set by an operator. This sync pulse launches
the ruby laser. The patient sits in a special chair and his chest is evenly illuminated
with the optical system of light beam formation. The scattered radiation is recorded
on the hologram with two reference beams, which were obtained with the help of
system for formation of recording and reconstructing beams.
Reconstruction of the double-exposure hologram was conducted with the continuous He–Ne laser.
The image of the chest with the interference pattern is formed on the receiving
area of the registration system with the optical system of interferogram formation.
With the electronic processing unit and conjugation with the computer analog-digital
processing of the image, its input in the computer and parallel displaying for visual
estimation of the interference pattern occur.
The values of shifts and speeds of points of the object surface are computercalculated.
Time diagram of operation of the complex is shown in Fig. 3.35. The thermoplastic interferogram recording unit, the pulse ruby laser, the shutter control unit are
consecutively switched on by the synchronization system when the selected by an
operator value of the curve on the computer cardiogram is reached. Two consequent
laser radiation pulses defined by the operator as delay get into the optical scheme
between them.
A beam, which illuminates the person, and two reference beams are formed in
the scheme. These beams correspond to the first and the second illuminating pulses
of the ruby laser.
The control unit of holographic interferogram (HI) recording on the photothermoplastic carrier (PTPC) was designed taking into account the possibility of using any
type of reversible carriers produced (Fig. 3.37) [171–183]. Universality is provided,
on the one hand, constructively through mounting changeable cassettes, and on
the other hand, schematically through setting all the parameters of recording on
a temporary diagram of the working cycle.
The hologram registration device is aimed at multiple recording and erasing of
optical holograms on the films of reversible photothermoplastic semiconductors
(PTS) with real-time processing of the carriers during registration (Fig. 3.38) [166,
184–200].
Multiple uses of the carriers and rapid registration process give the possibility
to promptly correct the optical scheme and registration conditions, which provide
obtaining the set data. The functional scheme of the reversible hologram registration
device is presented in Fig. 3.36. The control unit includes a charging timer, an exposure timer, processor and erasing timers, a scheme of setting initial parameters, a thermostat, an indicator of sample temperature, a heating unit, an overcurrent protective
circuit, a power unit. Registration cell includes a battery charger, a corona-forming
gap, a sample of the registering medium, a temperature-sensitive element.
The sample of the registering medium is a polymer film (PF) plotted on a glass
plate with a conductive SnO layer (Fig. 3.38).
247
The sync pulse is formed with the synchronization system in required phases of
the cardiac cycle in moments of time set by an operator. This sync pulse launches
the ruby laser. The patient sits in a special chair and his chest is evenly illuminated
with the optical system of light beam formation. The scattered radiation is recorded
on the hologram with two reference beams, which were obtained with the help of
system for formation of recording and reconstructing beams.
Reconstruction of the double-exposure hologram was conducted with the continuous He–Ne laser.
The image of the chest with the interference pattern is formed on the receiving
area of the registration system with the optical system of interferogram formation.
With the electronic processing unit and conjugation with the computer analog-digital
processing of the image, its input in the computer and parallel displaying for visual
estimation of the interference pattern occur.
The values of shifts and speeds of points of the object surface are computercalculated.
Time diagram of operation of the complex is shown in Fig. 3.35. The thermoplastic interferogram recording unit, the pulse ruby laser, the shutter control unit are
consecutively switched on by the synchronization system when the selected by an
operator value of the curve on the computer cardiogram is reached. Two consequent
laser radiation pulses defined by the operator as delay get into the optical scheme
between them.
A beam, which illuminates the person, and two reference beams are formed in
the scheme. These beams correspond to the first and the second illuminating pulses
of the ruby laser.
The control unit of holographic interferogram (HI) recording on the photothermoplastic carrier (PTPC) was designed taking into account the possibility of using any
type of reversible carriers produced (Fig. 3.37) [171–183]. Universality is provided,
on the one hand, constructively through mounting changeable cassettes, and on
the other hand, schematically through setting all the parameters of recording on
a temporary diagram of the working cycle.
The hologram registration device is aimed at multiple recording and erasing of
optical holograms on the films of reversible photothermoplastic semiconductors
(PTS) with real-time processing of the carriers during registration (Fig. 3.38) [166,
184–200].
Multiple uses of the carriers and rapid registration process give the possibility
to promptly correct the optical scheme and registration conditions, which provide
obtaining the set data. The functional scheme of the reversible hologram registration
device is presented in Fig. 3.36. The control unit includes a charging timer, an exposure timer, processor and erasing timers, a scheme of setting initial parameters, a thermostat, an indicator of sample temperature, a heating unit, an overcurrent protective
circuit, a power unit. Registration cell includes a battery charger, a corona-forming
gap, a sample of the registering medium, a temperature-sensitive element.
The sample of the registering medium is a polymer film (PF) plotted on a glass
plate with a conductive SnO layer (Fig. 3.38).