Details: bi-convex lens for focal length 75 mm with mount- (units:02)material: n-bk7diameter size: 2”wavelength:400-700nmsurface quality:40-20 scratch-digfocal length: 75 mmclear aperture: >90%surface irregularity: ≤ λ/4ar coating reflectance: <0.5%centration: ≤3 arcmindiameter tolarance:+0.0mm/-0.1 mmfocal lengh tolarance:±1% with lens mount with suitable 75 mm post and post-holder2. bi-convex lens for focal length 100 mm with mount- (units:02) material: n-bk7diameter size: 2”wavelength:400-700nmsurface quality:40-20 scratch-digfocal length: 100 mmclear aperture: >90%surface irregularity: ≤ λ/4ar coating reflectance: <0.5%centration: ≤3 arcmindiameter tolarance:+0.0mm/-0.1 mmfocal lengh tolarance:±1% with lens mount with suitable 75 mm post and post-holder3. bi-convex lens for focal length 200 mm with mount- (units:02) material: n-bk7diameter size: 2”wavelength:400-700nmsurface quality:40-20 scratch-digfocal length: 200 mmclear aperture: >90%surface irregularity: ≤ λ/4ar coating reflectance: <
Sector: Science University