Uni Optics’s Plano Concave Circular Cylindrical Lens has a concave curvature in the vertical direction and has no curvature in the horizontal direction. They are edged as circular shapes so they can easily be combined with other elements in an optical system.
1、Why is cylindrical lens used?
A cylindrical lens is typically used to focus, condense or expand incoming light. A cylindrical lens has one cylindrical surface, causing light to be focused in a single dimension or axis.
2、Which defect of the eye can be corrected by using a cylindrical lens?
The defect of the eye that can be corrected by using cylindrical lens is Astigmatism. Astigmatism is caused due to uneven curvature of the eye lens.
3、How do concave and convex lenses correct vision?
Concave Lenses Are for the Nearsighted, Convex for the Farsighted. Concave lenses are used in eyeglasses that correct nearsightedness. ... Placing concave lenses in front of a nearsighted eye reduces the refraction of light and lengthens the focal length so that the image is formed on the retina.
Common specification
Material: Schott, CDGM, Ohya, Ohara, Corning, etc.
Diameter tolerance: +0/-0.05mm
Effective Focal Length Tolerance:±2%
Centering Tolerance:≤3 arc min
Surface Quality: 40-20 S/D
Surface flatness: N=5△N=0.5
Clear aperture: > 90 % of surface dimensions
Coating: Optional ( Uncoated / Single layer MgF2 / Broadband AR )
A cylindrical lens is a
lens with different radii on the X and Y axes, giving the lens a
cylindrical or semi-cylindrical shape and the image is magnified in only
one axis. Spectrometers often use cylinder lenses in their design.
|
Part NO.
|
Material
|
F(mm)
|
Φ(mm)
|
R(mm)
|
Tc(mm)
|
Te(mm)
|
Fb(mm)
|
|
ULYRPV008005
|
BK7
|
-8
|
5
|
-4.13
|
2
|
2.84
|
-9.34
|
|
ULYRPV092008
|
BK7
|
-9.2
|
8
|
-4.74
|
2
|
4.2
|
-10.53
|
|
ULYRPV010008
|
BK7
|
-10
|
8
|
-5.16
|
2
|
3.89
|
-11.31
|
|
ULYRPV125127
|
BK7
|
-12.5
|
12.7
|
-6.43
|
2
|
7.44
|
-13.8
|
|
ULYRPV025127
|
BK7
|
-25
|
12.7
|
-12.89
|
2
|
3.67
|
-26.33
|
|
ULYRPV050127
|
BK7
|
-50
|
12.7
|
-25.76
|
2
|
2.8
|
-51.33
|
|
ULYRPV075254
|
BK7
|
-75
|
25.4
|
-38.64
|
2
|
4.15
|
-76.34
|
|
ULYRPV100254
|
BK7
|
-100
|
25.4
|
-51.52
|
3
|
4.59
|
-102
|
|
ULYRPV150254
|
BK7
|
-150
|
25.4
|
-77.27
|
3
|
4.05
|
-151.99
|
