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3 Holographic Interferometry for Studying …
spatial vector of relative shifts of surface points, which are connected with the state of
the circulatory system. Optical schemes of systems for formation of illuminating and
recording light beams provide possibility to obtain holographic interferograms of the
human chest, which contain information about its shifts. Conditions were determined
concerning the process of synchronization of human chest holograms recording with
different phases of heart contractions. A test sample of the laser-holographic complex
(holographic cardiograph) was developed and produced to study the state of the
human circulatory system, which was developed according to the technical requirements; it was in working conditions and gave the possibility to conduct physical and
medical study. The compatibility of the complex apparatus according to the signals
parameters with the following characteristics, such as interference immunity, vibroprotection, mutual synchronization, including those with timing in any phase of heart
contractions, was provided. The test sample consisted of a holographic table, a ruby
laser radiator, He–Ne laser, an optical unit of a holographic interferograms registration block on reversible PTPC, “Impecard” complex, a computer with a display and
a synchronization block.
The test sample was adjusted that provided the possibility of autonomous operation of different LHC blocks and in the complex with synchronization providing
the possibility of adjustment to certain phases of heart contractions. It was established that LHC synchronization adjustment should be conducted in the middle of
the ascending or descending branch of the impedance plethysmogram curve. The
choice of the time moments is conducted by the computer operator due to the ECG
curve in the “Operator’s menu” mode.
A test sample of the laser radiator was assembled and adjusted. The laser radiator
wavelength is 694.3 nm. The ruby laser radiator operated in the double monopulses
generation mode with the regulated interval between pulses in the single-mode
regime. Energy of each of the two pulses of the generator radiation is 0.01 J, of
the amplifier is 0.025 J, and of the total one is 0.5 J. The width of the laser radiation
spectral band is not more than 100 MHz. The laser radiation pulse duration is 20–
120 ns. The time interval between the radiation pulses (regulated in the interval) is
100–700 μs.
Due to the functional requirements, the synchronization block formed the
necessary pulse drivers of:
the power supply of the ruby laserRuby laser with the regulated period (10–20 μs
with the accuracy of +1 μs);
the shutter control unit (50–1000 μs);
the reversible carrier control unit (100–400 μs).
The unit of hologram recording on reversible photothermoplastic carriers was
developed and produced.
The temperature control of the carrier is provided in the preparation mode within
the limits of 40–90°. The range of the energy regulation of the developing pulse
is 1–4 J/cm along the thermoelement area. In the charge mode, the corona charge
3 Holographic Interferometry for Studying …
spatial vector of relative shifts of surface points, which are connected with the state of
the circulatory system. Optical schemes of systems for formation of illuminating and
recording light beams provide possibility to obtain holographic interferograms of the
human chest, which contain information about its shifts. Conditions were determined
concerning the process of synchronization of human chest holograms recording with
different phases of heart contractions. A test sample of the laser-holographic complex
(holographic cardiograph) was developed and produced to study the state of the
human circulatory system, which was developed according to the technical requirements; it was in working conditions and gave the possibility to conduct physical and
medical study. The compatibility of the complex apparatus according to the signals
parameters with the following characteristics, such as interference immunity, vibroprotection, mutual synchronization, including those with timing in any phase of heart
contractions, was provided. The test sample consisted of a holographic table, a ruby
laser radiator, He–Ne laser, an optical unit of a holographic interferograms registration block on reversible PTPC, “Impecard” complex, a computer with a display and
a synchronization block.
The test sample was adjusted that provided the possibility of autonomous operation of different LHC blocks and in the complex with synchronization providing
the possibility of adjustment to certain phases of heart contractions. It was established that LHC synchronization adjustment should be conducted in the middle of
the ascending or descending branch of the impedance plethysmogram curve. The
choice of the time moments is conducted by the computer operator due to the ECG
curve in the “Operator’s menu” mode.
A test sample of the laser radiator was assembled and adjusted. The laser radiator
wavelength is 694.3 nm. The ruby laser radiator operated in the double monopulses
generation mode with the regulated interval between pulses in the single-mode
regime. Energy of each of the two pulses of the generator radiation is 0.01 J, of
the amplifier is 0.025 J, and of the total one is 0.5 J. The width of the laser radiation
spectral band is not more than 100 MHz. The laser radiation pulse duration is 20–
120 ns. The time interval between the radiation pulses (regulated in the interval) is
100–700 μs.
Due to the functional requirements, the synchronization block formed the
necessary pulse drivers of:
the power supply of the ruby laserRuby laser with the regulated period (10–20 μs
with the accuracy of +1 μs);
the shutter control unit (50–1000 μs);
the reversible carrier control unit (100–400 μs).
The unit of hologram recording on reversible photothermoplastic carriers was
developed and produced.
The temperature control of the carrier is provided in the preparation mode within
the limits of 40–90°. The range of the energy regulation of the developing pulse
is 1–4 J/cm along the thermoelement area. In the charge mode, the corona charge