Operating Principle of the Non-Polarizing Beamsplitter
Achieved by a neutral beam splitting coating (metallic or dielectric coating), the reflected and transmitted light contains all polarized components in a constant ratio.
Splitting is more uniform for unpolarized light, e.g. 50:50 NPBS will reflect 50% of the energy and transmit 50% of the energy, regardless of polarization.

What are the properties of the Non-Polarizing Beamsplitter?
Polarization-independent: the spectral ratio remains stable over a wide range of wavelengths and angles of incidence.
Low polarization sensitivity: reflected and transmitted light remains natural light (unpolarized).

What are the applications of the Non-Polarizing Beamsplitter?
General beam splitting systems, interferometers, illumination homogenization, laser power monitoring, etc.

Non-Polarizing Beamsplitter (NPBS)
Material	BK7 (K9)
Dimension	3×3mm-50×50mm
S/D	60/40, 40/20
Flatness	λ/4 - λ/10
|Ts-Tp| |Rs-Rp|	|Ts-Tp|＜10%, |Rs-Rp|＜10%
R/T Data	30/70, 50/50, 70/30
Wavelength	VIS(400-700nm)

How to distinguish between a polarizing beamsplitter and a non-polarizing beamsplitter?
Characteristic	Polarizing Beamsplitter	Non-Polarizing Beamsplitter
Basis for spectrophotometry	Polarization state (S/P optical separation)	Energy ratio (independent of polarization)
Output light polarization state	Reflected light (S), transmitted light (P)	Reflected/transmitted light is unpolarized
Extinction ratio	High（>100:1）	Low (unpolarized selectivity)
Applicable light source	Polarized light or systems requiring polarization control	Unpolarized light or polarization-insensitive systems