Line pairs per mmradiology

Intensity evolution of the LP11 mode in a tapered fiber. In the tapered region, most of the light is lost into the fiber cladding

lp/mm to resolution

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Indeed, nitrogen lasers may be built without any resonator mirror, or with just a mirror on one end. You may then call it an ASE source. A laser would normally be expected to have a laser resonator, but being a bit more lax, one may apply that term also to that nitrogen device.

Example: 5.5um pixel monochrome corresponds to 500/(5.5*1.4) = 500 / 7.7 = 65 lp/mm Example: 2.2um pixel color corresponds to 500/(2.2*2) = 500 / 4.4 = 114 lp/mm

Line pairs per mmand pixel size

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There can be a substantial number of rotational–vibrational lines on which such a laser can be operated (→ vibronic lasers), but single-line emission and even single-frequency operation is not difficult to achieve with an intracavity bandpass filter, since the Doppler broadening of the laser transition is quite weak. If the pressure is relatively high, however, the different lines may overlap due to pressure broadening, resulting in a larger gain bandwidth.

Line pairs per mmconverter

Line pairs per mmcalculator

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For monochrome applications the pixel size is multiplied by factor 1.41 (=square root of two). The result is the diagonal of the pixel.

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Molecular lasers are gas lasers where the laser-active constituents are molecules rather than separate atoms or ions. Examples of such molecules are CO2 (carbon dioxide), CO (carbon monoxide), N2 (nitrogen), HF (hydrogen fluoride), DF (deuterium fluoride), NH3 (ammonia) and CH3OH (methanol). One exploits excited states of such molecules which can involve not only a purely electronic excitation (as of atoms or ions) but also vibrations and rotations of the molecules. The excitation energies are in most cases relatively small, leading to laser emission with long wavelengths in the mid or far infrared spectral region.