Introduction of Kunshan Nuoli Optics: What are the specific effects of microcracks on the properties of optical glass?

The influence of microcracks on optical glass is concentrated in three dimensions: optical properties, mechanical stability and service reliability, and most of them are irreversible damage.

Direct damage to optical performance

Scattering and light transmittance decrease: microcracks will change the light propagation path, lead to light scattering, reduce the glass transmittance and affect the imaging clarity of the optical system.

Deterioration of imaging quality: the abrupt change of refractive index at the crack edge will produce aberration and stray light, resulting in blurred and ghosted imaging, which can not meet the requirements of high-precision optical equipment.

Abnormal spectral characteristics: deep microcracks may absorb light with a specific wavelength, which will lead to the shift of spectral curve and affect the use effect of optical glass in a specific band.

Seriously weaken the mechanical properties.

Strength is greatly reduced: microcracks are stress concentration points, which will spread rapidly when stressed, resulting in the decrease of impact resistance and compression resistance of glass, which is easy to break in subsequent processing or use.

Stability deterioration: even if it does not break immediately, microcracks will slowly extend with environmental factors such as temperature change and vibration, and may suddenly fail after long-term use.

The chain effect on the reliability of use

Shortened service life: Micro-cracks will accelerate the aging of glass, especially in the humid and volatile temperature environment, water infiltration into cracks will lead to chemical corrosion and further damage the glass structure.

Initiate secondary defects: abrasive and impurities are easy to remain at microcracks, and new defects such as scratches and edge collapse may be derived in subsequent processing, which will expand quality problems.