• 1
  • 2
  • 3
  • 4
  • 5
Products & Services  >  Spherical Lenses  >  Double Concave Lens
Double Concave Lens
Bi-Concave Lenses are popular for many applications. Bi-concave lenses have a negative focal length and are best used to diverge a converging beam. Bi-concave lenses can diverge a collimated beam to a virtual focus and are commonly used in Galilean-type beam expanders.
Specifications:
Material .........................................................................BK7,UVFS
Design Wavelength ..........................................................546.1nm
Design Index ................................BK7 @1.5183;UVFS @1.46008
Diameter Tolerance ..................................................+0.0/-0.15mm
Paraxial Focal Length .................±2%(f<400mm);±5%(f>=400mm)
Centration ...............................................................<3 arc minutes
Clear Aperture .......................................................................>90%
Surface Quality ......................................................................60-40
Bevel................................................................................Protective
P/NfΦtctefbMaterial
30401-15.012.72.05.0-15.7UVFS
30402-20.012.72.04.2-20.7UVFS
30403-25.012.72.03.7-25.7UVFS
30404-30.012.72.03.5-30.7UVFS
30405-40.012.72.03.1-40.7UVFS
30406-25.025.42.09.5-25.7UVFS
30407-35.025.42.07.2-35.7UVFS
30408-50.025.42.05.6-50.7UVFS
30409-75.025.42.04.3-75.7UVFS
30410-100.025.42.03.8-100.7UVFS
30411-150.025.42.03.2-150.7UVFS
30412-200.025.42.02.9-200.7UVFS
30413-250.025.42.02.7-250.7UVFS
30414-300.025.42.02.6-300.7UVFS
30415-500.025.42.02.4-500.7UVFS
30416-1000.025.42.02.2-1000.7UVFS
30417-50.038.03.011.1-51.0UVFS
30418-100.038.03.06.9-101.0UVFS
30419-150.038.03.05.6-151.0UVFS
30420-200.038.03.05.0-201.0UVFS
30421-350.038.03.04.1-351.0UVFS
30422-500.038.03.03.8-501.0UVFS
30423-10.010.02.04.5-10.6BK7
30424-15.012.72.04.6-15.6BK7
30425-20.012.72.04.0-20.6BK7
30426-25.012.72.03.6-25.7BK7
30427-30.012.72.03.3-30.7BK7
30428-40.012.72.03.0-40.7BK7
30429-50.012.72.02.8-50.7BK7
30430-35.025.42.06.5-35.7BK7
30431-50.025.42.05.1-50.7BK7
30432-75.025.42.04.1-75.7BK7
30433-100.025.42.03.6-100.7BK7
30434-125.025.42.03.2-125.7BK7
30435-150.025.42.03.0-150.7BK7
30436-175.025.42.02.9-175.7BK7
30437-200.025.42.02.8-200.7BK7
30438-250.025.42.02.6-250.7BK7
30439-300.025.42.02.5-300.7BK7
30440-500.025.42.02.3-500.7BK7
30441-1000.025.42.02.2-1000.7BK7
30442-50.038.03.010.1-51.0BK7
30443-100.038.03.06.5-101.0BK7
30444-150.038.03.05.3-151.0BK7
30445-200.038.03.04.7-201.0BK7
30446-350.038.03.04.0-351.0BK7
30447-500.038.03.03.7-501.0BK7
30448-700.038.03.03.5-701.0BK7
30449-100.050.03.09.1-101.0BK7
30450-150.050.03.07.0-151.0BK7
30451-200.050.03.06.0-201.0BK7
30452-250.050.03.05.4-251.0BK7
30453-400.050.03.04.5-401.0BK7
30454-450.050.03.04.3-451.0BK7
30455-500.050.03.04.2-501.0BK7
30456-600.050.03.04.0-601.0BK7
30457-800.050.03.03.8-801.0BK7
●Unit:mm
●Other sizes and coatings are available upon request.