Methods of creating a natural environment are increasingly used to reduce stress in the workplace and increase productivity. When an artificial visual environment is created, it is important that the degree of self-similarity of the images approximates the values characteristic of the natural environment. It should be noted that the degree of selfsimilarity of the visual environment that surrounds a person in everyday life (in an office, in an urban environment) is usually low, and natural landscapes have a high degree of self-similarity. A visual environment with a high degree of self-similarity can be obtained by passing laser radiation through optically inhomogeneous media or objects of complex shape with a small-sized chaotic structure. The images obtained in this way have a natural structure in a certain sense, because they are based on the effects of interference and dispersion (i.e. natural). However, in our experiments the resulting image has areas of great brightness. The eye adopts precisely for the perception of these parts of the image, and the most interesting part of its structure can be out of the range of perception, which denies the efforts to make such an image. We analyze possible ways of solving this problem and get a complex image of the structure without sharp changes in brightness. The main task here is to select the parameters of the complex object and the parameters of the laser beam so that the object can be made without using special microtechnologies and at the same time obtain the desired image.
Abstract images with high self-similarity could be used for drug-free stress therapy. This based on the fact that a complex visual environment has a high affective appraisal. To create such an image we can use the setup based on the three laser sources of small power and different colors (Red, Green, Blue), the image is the pattern resulting from the reflecting and refracting by the complicated form object placed into the laser ray paths. The images were obtained experimentally which showed the good therapy effect. However, to find and to choose the object which gives needed image structure is very difficult and requires many trials. The goal of the work is to develop a method and a procedure of finding the object form which if placed into the ray paths can provide the necessary structure of the image In fact the task means obtaining the necessary irradiance distribution on the given surface. Traditionally such problems are solved using the non-imaging optics methods. In the given case this task is very complicated because of the complicated structure of the illuminance distribution and its high non-linearity. Alternative way is to use the projected image of a mask with a given structure. We consider both ways and discuss how they can help to speed up the synthesis procedure for the given abstract image of the high self-similarity for the setups of drug-free therapy.
Recently there is a great interest to the drug-free methods of treatment of various diseases. For example, audiovisual
therapy is used for the stress therapy. The main destination of the method is the health care and well-being.
Visual content in the given case is formed when laser radiation is passing through the optical mediums and elements. The
therapy effect is achieved owing to the color varying and complicated structure of the picture which is produced by the
refraction, dispersion effects, diffraction and interference.
As the laser source we use three laser sources with wavelengths of 445 nm, 520 nm and 640 nm and the optical power up
to 1 W. The beam is guided to the optical element which is responsible for the final image of the dome surface. The
dynamic image can be achieved by the rotating of the optical element when the laser beam is static or by scanning the
surface of the element.
Previous research has shown that the complexity of the image connected to the therapy effect. The image was chosen
experimentally in practice. The evaluation was performed using the fractal dimension calculation for the produced image.
In this work we model the optical image on the surface formed by the laser sources together with the optical elements.
Modeling is performed in two stages. On the first stage we perform the simple modeling taking into account simple
geometrical effects and specify the optical models of the sources.
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