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  | Frequently asked questions about...
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How many cycles can the iris diaphragms endure?
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That depends on the iris size and the load the iris has to take. Under normal conditions the lifetime of an iris is several-hundred-thousand cycles.
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Should I lubricate the iris diaphragms?
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Under no circumstances should any lubrication be applied to the iris, especially the leaves. This would destroy the iris after a few cycles. The coating on the leaves is designed as a permanent dry lubricant.
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The catalog lists that pinholes are available in stainless steel and gold-coated copper. Which pinhole is which material?
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The Standard Pinholes (mounted and unmounted) in the 04 PIP and 04 PPM series are made from stainless steel.
The High-Energy Laser Pinholes (mounted and unmounted) in the 04 PHP and 04 PHM series are made from copper with a hard coating of gold on one side and a black coating on the other.
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What is the damage threshold of the Standard Pinholes?
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The steel Standard Pinholes have a typical cw damage threshold of 1 kW/cm2.
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Your catalog mentions that the High-Energy Laser Pinholes are tested to withstand up to 50 MW/mm2, is that correct?
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No. There was a typographical error in the printed version of Catalog X. The typical damage threshold is actually 50 MW/cm2. The online version of the catalog reflects this change.
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