What are the advantages of multispectral zinc sulphide lenses and standard zinc sulphide lenses?
Wide band transmission: good transmission from visible to far infrared.
Low absorption: low absorption in infrared wavelength, high transmittance.
Chemical stability: acid and alkali corrosion resistance, suitable for harsh environments.
Thermal stability: good, stable performance under high temperature.

What are the disadvantages of multispectral zinc sulphide lenses and standard zinc sulphide lenses?
Low hardness: Mohs hardness 3, easy to scratch, need protective measures.
High cost: high material and processing costs.
Processing difficulty: processing difficulty is medium, need precision processing equipment.

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