High-spatial resolution stacked-actuator deformable mirror for correction of atmospheric wavefront aberrations.

Deformable mirrors are vital components of any adaptive optical system. Considering such a crucial role in compensation of incident wavefront distortions, the main requirements are imposed on these elements that determine performance of the entire system. To correct for phase distortions in high-power laser complexes a stacked-actuator deformable mirror with water cooling was developed.

Real-time 1.5 kHz adaptive optical system to correct for atmospheric turbulence.

Problems of constructing an adaptive optical system intended for correcting the wavefront of laser radiation that has passed through a turbulent atmosphere are considered. To ensure high-quality wavefront correction, the frequency of the discrete system should be at least 1 kHz or more. This performance can be achieved by using FPGA as the main control element of the system.

Bimorph deformable mirror with a high density of electrodes to correct for atmospheric distortions.

This paper presents a new development of small-diameter, high-spatial-resolution, semipassive bimorph deformable mirrors to be used in different imaging systems. To manufacture the small control elements, laser engraving technology is used. An ultrasonic welding technique to connect the wires to the electrodes (actuators) is applied for this kind of mirror.

Extremely high-power CO2 laser beam correction.

This paper presents the results of high-power CO2 laser-aberration correction and jitter stabilization. A bimorph deformable mirror and two tip-tilt piezo correctors were used as executive elements. Two types of wavefront sensors, one Hartmann to measure higher-order aberrations (defocus, astigmatism etc.

[The surgical treatment of cancer of the middle lobe of the lung].

The immediate and long-term results of surgical treatment for cancer of the middle lobe of the lung in 84 patients are discussed. Radical procedure was used in 65 (77.4%) patients.

[Segmental and atypical resections in lung cancer].

Segmental or atypical resection was performed in 25 out of 1120 (2.2%) patients operated on for lung cancer. The choice was determined by concomitant pathology and old age.

[Conservative surgery in extensive forms of lung cancer].

The paper discusses a 15-year experience gained in using surgical treatment for lung cancer. Lobe- or bilobectomy, extended lobectomy and combined lobectomy were carried out for advanced tumor in 97 patients (11.5% of radically--operated cases).

[Mediastinal lymphadenectomy in diffuse forms of lung cancer].

Radical surgical interventions for spreaded forms of lung cancer were performed in 291 patients. Mediastinal lymphadenectomy was fulfilled in 147 out of these patients. No substantial difference was found between patients with lymphadenectomy and those without it.