Imaging system including beam guiding element having high solarization resistance in the blue spectral range

An imaging system, comprising:

• at least one laser light source B having a wavelength λB in a spectral range from 380 nm to 490 nm;
• at least one laser light source G having a wavelength λG in a spectral range from >490 nm to 585 nm;
• at least one laser light source R having a wavelength λR in a spectral range from >585 nm to 750 nm;
• and
• a beam guidance element, the laser light source B, the laser light source G, and the laser light source R being configured for generating, in at least one point of the beam guidance element, an average surface power density of more than 10 W/cm2, the beam guidance element including a glass which has an induced absorbance Abs1(RGB)=Abs1(436 nm)+Abs1(546 nm)+Abs1(644 nm), wherein Abs1(RGB) is <0.03/cm.

A beam guidance element, comprising:

• a glass which has at least one of the following properties:
• (a) a quality factor F(436 nm)=S(436 nm)*(Abs0(436 nm)+Abs1(436 nm))/k, wherein F(436 nm) is <15 ppm/W;
• (b) a quality factor F(RGB)=F(436 nm)+F(546 nm)+F(644 nm)=S(436 nm)*(Abs0(436 nm)+Abs1(436 nm))/k+S(546 nm)*(Abs0(546 nm)+Abs1(546 nm))/k+S(644 nm)*(Abs0(644 nm)+Abs1(644 nm))/k, wherein F(RGB) is <40 ppm/W;
• (c) an induced absorbance Abs1(436 nm)<0.01/cm;
• and
• (d) an induced absorbance Abs1(RGB)=Abs1(436 nm)+Abs1(546 nm)+Abs1(644 nm), wherein Abs1(RGB) is <0.03/cm.

A glass, comprising:

• at least one of the following properties:
• (a) a quality factor F(436 nm)=S(436 nm)*(Abs0(436 nm)+Abs1(436 nm))/k, wherein F(436 nm) is <15 ppm/W;
• (b) a quality factor F(RGB)=F(436 nm)+F(546 nm)+F(644 nm)=S(436 nm)*(Abs0(436 nm)+Abs1(436 nm))/k+S(546 nm)*(Abs0(546 nm)+Abs1(546 nm))/k+S(644 nm)*(Abs0(644 nm)+Abs1(644 nm))/k, wherein F(RGB) is <40 ppm/W;
• (c) an induced absorbance Abs1(436 nm)<0.01/cm;
• and
• (d) an induced absorbance Abs1(RGB)=Abs1(436 nm)+Abs1(546 nm)+Abs1(644 nm), wherein Abs1(RGB) is <0.03/cm.