Another advantage of AR coatings is that they make your glasses and eyes look better by nearly eliminating distracting reflections and glare that would otherwise bounce off your glasses.

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When you have AR coatings on your lenses, driving at night becomes a lot easier. The halo effect around car lights is reduced considerably.

These Galilean beam expanders incorporate the highly regarded Tropel optical designs with improved adjustability and mounting. They are ideal for applications in which a small spot must be formed at some distance from the laser, or where the collimation range must be extended for illumination, or for alignment of distant objects. Wavefront distortion of less than λ/4 guarantees a minimum focused spot size even at long ranges. The lenses are antireflection coated with magnesium fluoride optimized for 632.8 nm, yielding transmission of over 95%.

anti-glare什么意思

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Four expansion ratios are available, 3x, 10x, 20x, and 30x, each with a means for continuous focus change. As the power increases, the beam divergence decreases proportionately, providing a greater collimation range. These beam expanders feature 1-32 mounting thread and can be conveniently attached to most HeNe lasers using HENE-ADPT adapter. They are also equipped with precision beam centering adjustments to compensate for slight decentration of the entering laser beam (except for the T81-3X).

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anti-reflectivecoating是什么

The relationship between magnification M, spot size S, range R, and depth of field Z given below, assumes a TEM00 mode HeNe laser with a 0.8 mm diameter beam at 1/e2 intensity level. The values in the chart are based on the relationship S = KR/M. For S expressed in millimeters and R in meters, K = 1.1 for our T81-3X. T81-10X and T81-20X and K = 1.2 for our T81-30X. The depth of field Z is defined as the distance over which the beam diameter does not exceed 1.4 times the value at the beam waist S. The values for Z are computed from the formula Z=2.5S2, where S is expressed in millimeters and Z in meters. Laser beam diameters over 0.8 mm will produce diffraction rings in the focused spot due to aperturing at the output lens. For laser beams smaller than 0.8 mm diameter, the spot size will increase proportionally.

Four expansion ratios are available, 3x, 10x, 20x, and 30x, each with a means for continuous focus change. As the power increases, the beam divergence decreases proportionately, providing a greater collimation range. These beam expanders feature 1-32 mounting thread and can be conveniently attached to most HeNe lasers using HENE-ADPT adapter. They are also equipped with precision beam centering adjustments to compensate for slight decentration of the entering laser beam (except for the T81-3X).

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Anti-reflective (AR) eyeglass lenses reduce glare and reflections that are distracting and affect how well you see. That’s why anti-reflective coatings are one of the most popular lens choices among people who wear glasses.

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anti reflectivecoating中文

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AR coatings can also help prevent eye fatigue and digital eye strain. Your eyes don’t have to work as hard to capture a quality image since they get more light.

AR lenses have  a specialized coating that is made of a microscopic layer of metal oxides that neutralize reflections, allowing it to minimize glare from the front and back surfaces of each lens. They aid in the transmission of light through the optical lens and into your eye.

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Surfacecoating

The iris diaphragm is a structure found in the lenses of modern DSLR cameras. It controls the lens aperture and therefore the light entering the lens.

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Opticalcoating

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Anti-reflective coatings allow 99.5 percent of light to flow through the lens, compared to 92 percent for regular lenses.

For optimal clarity throughout the day, anti-reflective coatings can be applied to regular optical lenses as well as sunglasses.

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Without an AR coating, lenses have noticeable glare, which means light reflects off their surfaces, limiting the quantity of light traveling through the lens. This can make your vision less clear and lower your ability to detect contrasts, especially at night.

The relationship between magnification M, spot size S, range R, and depth of field Z given below, assumes a TEM00 mode HeNe laser with a 0.8 mm diameter beam at 1/e2 intensity level. The values in the chart are based on the relationship S = KR/M. For S expressed in millimeters and R in meters, K = 1.1 for our T81-3X. T81-10X and T81-20X and K = 1.2 for our T81-30X. The depth of field Z is defined as the distance over which the beam diameter does not exceed 1.4 times the value at the beam waist S. The values for Z are computed from the formula Z=2.5S2, where S is expressed in millimeters and Z in meters. Laser beam diameters over 0.8 mm will produce diffraction rings in the focused spot due to aperturing at the output lens. For laser beams smaller than 0.8 mm diameter, the spot size will increase proportionally.

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