Address: Room 118, Juyuan Zone, Jiading Disctrict, Shanghai, China.
Phone : 86-21-58817880 Fax : 86-21-58817881
Email: sale5@winvow.com
The openness of following case has been allowed by our clients with exception of key parameters, which is only 90% of complete design process.
I. Application
Telephoto lens with whole picture (focal length more than 50 mm).
II. Requirements
Applicable wavelength: visible light
EFL: 5.0 in
Lens quantity: not more than 4 pieces
Lens maximum diameter: less than 35 mm
Lens face type: all spherical
Lens material: optical glass
Lens gross weight: less than 30 g
Viewing angle: 20 degrees
Maximum aperture: 5.6
Rear intercept: more than 50 mm
Far ratio: less than 0.9
Maximum distortion: less than 1%
Resolution: more than 50 lp/mm@0.3
Maximum aperture without vignetting
Focus mode: external
Variable aperture available
III. Features
Typical telephoto lens are consisted of front positive lens and rear negative lens, and there is relative big space between them. We take this as initial structure for optimization design.
IV. Result
