Melles Griot 03BDL003 Visible Infrared Beamsplitter Filter

This part number refers to a visible–infrared beamsplitter / filter from Melles Griot, used in optical and laser systems to divide or combine beams and/or filter different wavelength bands.

What “B/S Filter V‑IR 050 50%=725”:

• B/S = Beamsplitter — an optic that splits an incoming beam into two separate paths (often roughly 50/50).

• V‑IR = Visible to Infrared — indicates spectral range that the optic is designed to work with (passes and reflects portions of visible and IR light).

• 050 = 50 mm diameter — a common size for optical plates/filters.

• 50% = roughly 50/50 split ratio — meaning about half the light is reflected and half is transmitted at the design wavelength.

• =725 likely refers to the wavelength (in nm) near which the 50/50 split performance is optimized — approximately 725 nm (in the red/near‑IR region).

Typical Use Cases

• In optical benches and lab setups to direct part of a beam to a detector while passing the rest onward.

• In imaging systems where separation of visible and IR components is desired.

• In laser experiments where feedback or monitoring is needed without absorbing too much energy.