Rod Lenses Cemented

Type: Cemented,           Flat/Flat,             Plano-Convex,
           Plano-Concave,  Double Convex

Material:
N-BK7, UVFS, H-K50,
H-F4, H-BAK7, H-LAF10L,
N-SK15, H-ZK21, H-F1, H-ZF4 etc

Type:
Cemented, Flat/Flat,
Plano-Concave, Plano-Convex,
Double Convex

Centering:
< 5’ for spherical surface

Clear Aperture:
90%

Diameter:
Ø0.6mm or customization

Flatness:
N<3, ΔN<0.5 for spherical surface
N λ/4~λ/8 for flat surface

Surface Quality:
20/10~60/40

Coating:
uncoated, or customized

Micro Rod Lenses are available with flat, plano-convex, plano-concave, cemented etc which applied in medical endoscopes.
single plano convex rod lens
two concave lens cemented
two lens cemented
three lens cemented
four lens cemented
Rod Lenses for Rigid Endoscopes
Rod lens systems use special glass rods with optically finished ends, providing images with higher brightness, contrast and colour reproduction than conventional lenses.
Commonly, rigid endoscopes have a series of high-resolution optical glass rod lenses. The endoscopes can be forward viewing (0 degrees) or angled (10–120 degrees) to allow visualization out of the axis of the telescope and increase the FOV by rotating the instrument. The optical quality of lens-generated images of rigid endoscopes still surpasses that of the fiber-optic or digital images produced by flexible scopes.

wdt_ID Attribute Value
1 Material N-BK7, UVFS, H-K50,
H-F4, H-BAK7, H-LAF10L,
N-SK15, H-ZK21, H-F1, H-ZF4
39 Diameter Ø0.6mm or customization
40 Type Flat/Flat
Plano-Convex
Plano-Concave
Cemented
41 Flatness N<3, ΔN<0.5 for spherical surface
N λ/4~λ/8 for flat surface
43 Centering <5’
44 Surface Quality 20/10~60/40
45 Clear aperture 90%
46 Coating Uncoated, or customized

Common Type

wdt_ID Material Diameter (mm) Thickness (mm) R
1 UV Fused Silica 0.73 10.0 /
39 H-K50 1.0 19.4 /
40 H-K50 1.78 19.4 /
41 H-K50 2.0 19.4 /
43 H-K50 2.8 19.4 /
44 H-F4 2.77 25.5 /
45 H-QK3L 2.8 21.77 /
46 H-F1 3.48 25.4 /
47 H-BAK7 6.53 42.0 /

   
wdt_ID Material Diameter (mm) Thickness (mm) R
1 UV Fused Silica 0.7 1.65 0.524
39 UV Fused Silica 0.7 1.6 0.467
40 UV Fused Silica 0.7 1.72 0.5
41 UV Fused Silica 1.0 4.83 1.523
43 UV Fused Silica 1.0 3.8 1.19
44 UV Fused Silica 1.0 4.1 1.3
45 UV Fused Silica 1.25 9.8 3.047
46 UV Fused Silica 1.25 11.0 3.42
47 UV Fused Silica 1.25 6.0 1.856
48 UV Fused Silica 1.25 3.25 0.748

wdt_ID Material Diameter (mm) Thickness (mm)
1 Two Parts 1.78 18.0
39 Two Parts 1.9 19.5
40 Two Parts 1.9 19.0
41 Two Parts 1.9 17.6
43 Two Parts 1.9 12.9
44 Two Parts 1.9 12.5
45 Two Parts 1.9 14.7
46 Two Parts 1.9 19.2
47 Two Parts 2.0 22.9
48 Two Parts 2.69 23.5

wdt_ID Material Diameter (mm) Thickness (mm)
1 Three Parts 1.5 18.0
39 Three Parts 1.8 24.08
40 Three Parts 1.8 15.07
41 Three Parts 1.8 15.21
43 Three Parts 1.9 24.08
44 Three Parts 1.9 15.07
45 Three Parts 1.9 17.33
46 Three Parts 1.9 24.52
47 Three Parts 1.9 15.21
48 Three Parts 1.9 24.89

wdt_ID Material Diameter (mm) Thickness (mm)
1 Four Parts 1.99 16.0
39 Four Parts 2.0 22.9
40 Four Parts 2.68 22.9
41 Four Parts 2.78 22.9
43 Four Parts 3.48 28.5
44 Four Parts 6.5 46.7
45 Four Parts 6.53 46.0

Related Resource for reference

Image Information in a Rigid Rod Lens Endoscope
Relay lens system: for image transport, also called as Image Reversal System (Rod Lens, Achromatic Doublets, GRIN Relay)
Click to Download the full article ENDOSCOPE IN NEUROSURGERY
Article source link: http://www.aiimsnets.org/review_seminar.asp

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