Rod Lenses Cemented
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.
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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 | 0.73 | 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) | 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 |
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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 | 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 |
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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 | 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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