Patterned Dichroic Filters

Multiple Spectral Filters on a Single Component

Various optical filter coatings are arranged on a common substrate by a sophisticated photolithography technique, or by using vapor shadow masks. The monolithic filter-arrays are produced with no expense for mounting or assembling. Plasma-assisted deposition guarantees high performance and long-term stable filter characteristics.

Benefits

• Monolithic component with various filters
• No assembly of filter components required
• Low thickness
• Flexible, high-performance spectral characteristics
• Low cross talk by black chromium mask
• Extreme environmental stability (heat, humidity, radiation)
• Space qualified

Applications

• Multi-spectral Imaging
• Multi-color optical sensors
• Order sorting filter arrays
• Color Stripe Projection
• Lighting

Technical Data

Wavelength range

250 – 2000 nm

Quantity of filter types per array

1 – 10

Passband transmittance

> 90%

Blocking

OD2 – OD4

Maximum filter dimension

200 mm

Minimum filter dimension

20 µm

Transition range between filters

< 20 µm

Position accuracy

< 2 µm

Surface Imperfections

< 100 µm

Temperature range

– 50… 150°C

Humidity range

0 – 99%