A search was made for high index of refraction liquids suitable for immersion of ruby crystals in high-energy lasers. One liquid, SnCl2 · 2H2O in glycerin, is reported which can exactly match the index of ruby (1.76) and which, at the same time, is stable to the flash-lamp environment and transparent at the ruby pumping and lasing wavelengths. Another liquid, saturated aqueous SnCl2 · 2H2O, has a slightly lower index (1.60), but is more generally useful because of its low viscosity. Eight additional liquids with indices in the range from 1.43 to 1.54 are reported and tables are included which list the relevant properties of all of the liquids considered.
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The numbers (1), (2), and (3) in the second column indicate the source of the data: (1) experimental; (2) International Critical Tables; (3) manufacturers’ data.
The qualitative terms low, medium, and high may be taken to imply viscosities comparable to those of water, glycerin, and syrup, respectively.
No measurable absorption at 6328 Å for a 42-cm path.
The numbers (1) and (2) in this column indicate the source of the data: (1) experimental; (2) International Critical Tables.
The qualitative terms low and medium may be taken to imply viscosities comparable to those of water and glycerin respectively.
Not saturated solutions. Hg(NO3)2 · H2O forms eutectic mixtures with HgI2 and with HgBr2. Meyerowitz (ref. 5) states that a water solution of mercuric nitrate and mercuric iodide has index 1.80. We found, however, that the high-index mixtures have a yellow color and high viscosity. The eutectic mixture of Hg(NO3)2 · H2O with HgBr2 is also very viscous.
The liquid turned yellow when flashed, but became clear again when in contact with Sn metal.
No measurable absorption at 6328 Å for a 42-cm path.
The numbers (1), (2), and (3) in the second column indicate the source of the data: (1) experimental; (2) International Critical Tables; (3) manufacturers’ data.
The qualitative terms low, medium, and high may be taken to imply viscosities comparable to those of water, glycerin, and syrup, respectively.
No measurable absorption at 6328 Å for a 42-cm path.
The numbers (1) and (2) in this column indicate the source of the data: (1) experimental; (2) International Critical Tables.
The qualitative terms low and medium may be taken to imply viscosities comparable to those of water and glycerin respectively.
Not saturated solutions. Hg(NO3)2 · H2O forms eutectic mixtures with HgI2 and with HgBr2. Meyerowitz (ref. 5) states that a water solution of mercuric nitrate and mercuric iodide has index 1.80. We found, however, that the high-index mixtures have a yellow color and high viscosity. The eutectic mixture of Hg(NO3)2 · H2O with HgBr2 is also very viscous.
The liquid turned yellow when flashed, but became clear again when in contact with Sn metal.
No measurable absorption at 6328 Å for a 42-cm path.
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