Method for preparing potassium dihydrogen phosphate twin crystal
A technology of potassium dihydrogen phosphate and twinning, which is applied in the field of crystal material preparation, can solve the problems of low quality, imperfect interface, and less natural twinning, and achieve the effect of simple growth equipment and mature growth technology
Inactive Publication Date: 2009-07-08
SHANGHAI UNIV
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Problems solved by technology
[0003] The purpose of this invention is to propose a new method of cultivating twins for the current natural twins with few and low quality, the twins made by "optical glue" means, the interface is not perfect, and the light wave has a certain scattering.
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Embodiment 1
[0016] Embodiment one: the specific process steps of the embodiment of the present invention are as follows:
[0017] 1. Cultivate high-quality KDP single crystals with a cross-sectional area of 13mm×15mm and complete shape according to the KDP single crystal growth technology;
[0018] 2. Cut the KDP single crystal into two sections of similar size, select two cone surfaces to be pasted oppositely, and grind the two cone surfaces with fine sandpaper (when grinding, the two cone surfaces adjacent to the large cone surface to be ground All the cones are ground off, and only two cones are left for each segment of the crystal), such as figure 1 Then use fine sandpaper to grind away the tiny miscellaneous crystals on the surface of the crystal, grind the cut two sections of crystal into two sections of the same size, and grind the two oppositely pasted cones into two cones of the same size, and finally polish it with soft silk crystals.
[0019] 3. Two sections of crystals cut...
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The invention relates to a method for preparing potassium dihydrogen phosphate (KDP) twins, which is a method for artificially cultivating twins by using an aqueous solution cooling method, and belongs to the technical field of crystal material preparation. The preparation steps of the present invention are as follows: cutting the potassium dihydrogen phosphate (KDP) single crystal with complete shape into two sections of the same size, selecting two cone surfaces to be relatively pasted, grinding the two cone surfaces with fine sandpaper and grinding them into The same size; then paste the two pieces of crystals on the plexiglass plate, the two large cones are parallel to each other with a distance of 1.5cm, and the other two cones are in a straight line; put the above-mentioned pasted crystals in advance In the prepared saturated potassium dihydrogen phosphate solution, the temperature conditions for crystal growth are controlled, and the temperature is lowered according to the designed program, so that the crystals grow well in the solution. A KDP twin with two optical axes at 90° is obtained.
Description
technical field [0001] The invention relates to a method for preparing potassium dihydrogen phosphate (KDP for short) twins, which is a method for artificially cultivating twins by using an aqueous solution cooling method, and belongs to the technical field of crystal material preparation. Background technique [0002] Studies have shown that within a certain range of incident angles, the refraction and reflection of light waves at the twin interface has characteristics different from those of conventional optical materials—equivalent negative refraction and total transmission. We can use the equivalent negative refraction phenomenon of the twin interface to carefully design the twin structure, so that the twin interface can realize the equivalent negative refraction phenomenon in all angles, and compensate the dispersion and birefringence of the crystal as much as possible, so that the twin interface The ground may have a similar effect to a lens, converging light and formi...
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IPC IPC(8): C01B25/30
Inventor 王燕余岢岳桢干
Owner SHANGHAI UNIV