Up to date, there has still been no electronic camera that can match a rotating mirror camera with film for the main
features; therefore, it is necessary to further make R&D work in field of rotating mirror cameras. In this paper, some key
problems for this kind of camera have been discussed in detail, which cover the new information theory, the advanced
techniques of the optical accelerating, the shape and size calculation of rotating mirror surface in any case, the nonberyllium
rotating mirror with the same deformation as beryllium rotating mirror, and the perfect designing theory of
The numerical analysis method for the surface deformation of rotating mirrors were presented based on the
three-dimensional elastic mechanics and the computational techniques of finite element in this manuscript. With this
method, the surface deformation curves of rotating mirrors including multi-surfaces from three to eight, aluminous, steel,
and beryllium ones were calculated. A result was obtained that surface patterns of a mirror in operation are primarily
dependent on the amount of surfaces and the axial hole which whether or not exists for aluminous and steel mirrors, but
it rests with the amount of surfaces as well as Poisson's ratio for a beryllium mirror with so tiny Poisson's ratio. This
conclusion is different from that of forerunner.
The methods of numerical analysis for the strength and vibration modals of rotating mirrors were presented based
respectively on the three-dimensional elastic mechanics and dynamics. On strength computation, the finite element
models of rotating mirror were established according to the real structure of mirror, and the rotating three-faced
aluminous and beryllium mirrors were analysed contrastively. Results display that the surface deformation quantity of the
aluminous mirror is approximately 20 times as large as beryllium one, and the maximum stress is 1.6 times against the
latter. Then, the three-faced aluminous mirrors were analyzed at variedly fit between shaft and axle hole. One conclusion
is gotten out that the mirror strength is foreign to fits, but it is weaken by the axle hole obviously. On the modal analysis
of vibration, this method can simulates accurately the natural frequencies and corresponding modalities of mirror. And
the results from three-face aluminous mirror indicate that the resonance points of a new mirror may be guaranteed
existing in selected speed range.
This paper deals with the approaching surveying principle and data processing for launching and taking-off of a large
means of delivery; moreover, the special requirements of the drift magnitude surveying optical system, the intermittent
performance of the synchronous high speed camera, the high speed tracing and accurate measurement of angles, and the
synchronous controlling, are also described. The approching survey means here the surveying range from the surveying
facility to the launching tower is about 100m~200m.
A key to implement tubeless extreme high speed photography (EHSP) is to ask for help from parallel processing of light and to exploit different light properties: amplitude, phase, polarization, wavelength, wave vector, even photon spin and photon mode. Holography is an important technique to implement multi-frame EHSP, because a hologram is a result derived from contributions of multiple light merits. In this paper, techniques to implement holography-based EHSP are described, including mechanism of generating multiple frames and extreme high photographic rate.
In this paper we try to perfect information theory of high speed photography (HSP), which are theoretically and practically analyzed with theory on degree of freedom (DOF). Generally speaking, information theory of HSP should be able to used for evaluating HSP systems and HSP methods, and for the best it should be able to show the way to upgrade HSP's performances and throughly exploits resources of the recording light used as information carrier. As a method for studying information theory of HSP, optical DOF theory should be utilized at first, in which particularities of HSP systems, statistical rules of measured events and know-how from long-term HSP’s practices must be taken into consideration.
A rotating mirror is a kernel unit in a Miller-type high speed camera, which is both as an imaging element in optical path and as an element to implement ultrahigh speed photography. According to Schardin’s Principle, information capacity of an ultrahigh speed camera with rotating mirror depends on primary wavelength of lighting used by the camera and limit linear velocity on edge of the rotating-mirror: the latter is related to material (including specifications in technology), cross-section shape and lateral structure of rotating mirror. In this manuscript dynamic behavior of high strength aluminium alloy rotating mirrors is studied, from which it is preliminarily shown that an aluminium alloy rotating mirror can be absolutely used as replacement for a steel rotating-mirror or a titanium alloy rotating-mirror in framing photographic systems, and it could be also used as a substitute for a beryllium rotating-mirror in streak photographic systems.