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SELFOC® MicroLens Options
AR Coating
AR coatings reduce the amount of light lost due to Fresnel reflections at the lens surfaces.
They also help to protect the lens surfaces from humidity, chemical reaction and physical damage. Four grades (A,
C, D, W) of coating are available, each with its unique characteristics. The coatings are optimized for specific
wavelength(s).
Table 1 AR Coating Specifications
- ITEMS \ COATING TYPE
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- NON-COATED
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- A-GRADE
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- C-GRADE
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- D-GRADE
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- W-GRADE
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- Max. Total Reflection
from Both Surfaces
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- 9 - 12%
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- 0.5%
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- 2.5%
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- 1.0%
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- 1.0%
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- Spectrum Width
@ Max. Reflectance
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-
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- l +/- 15 nm
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- l +/- 30 nm
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- 830 +/- 15 nm
1300 +/- 30 nm
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- 1300 +/- 30 nm
1560 +/- 30 nm
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- Coating Structure
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-
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- Multilayer
Metal Oxide
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- Single Layer
MgF2
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- Multilayer
Metal Oxide
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- Multilayer
Metal Oxide
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- Maximum Temperature
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- 350°C
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- 200°C´1000 hrs.
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- Maximum Humidity
and Reliability
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- not recommended for high humidity
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- 85°C-85%RH
1000 hours
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- 60°C-95%RH
1000 hours
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- 85°C-85%RH
1000 hours
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- 85°C-85%RH
1000 hours
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Metallization
Metallization of side surface allows the user to solder the lens into a housing. The purpose
is to create a hermetic seal and to provide greater bonding strength than epoxy bonding.
Metallization is available for SML/PCW/PCH, and ILW/ILH with diameters from 0.7 mm to 2.7 mm.
Minimum quantity is 10 pcs for SML/PCW/PCH and 100 pcs for ILW/ILH.
Table 2 Specifications
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ITEM
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SPECIFICATIONS
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REMARKS
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Number of Layers
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3
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Outer Layer Material
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Gold
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Nominal Thickness
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7000 Å
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Wettability
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95% of area
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230°C´5 sec.
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Max.Soldering Temp
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230°C
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10 sec. max.
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Guaranteed Area*
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Side surface except 0.5mm from both ends
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See Figure 4
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* Max. allowable pin hole size is 0.5 mm diameter.
Table 3 Recommended Soldering Conditions
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Solder Type
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Tin-Lead (Sn-Pb) Eutectic
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Flux Type
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Rosin Type, Chlorine free
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Max. Solder Temp/Time
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230°C ´ 10 sec.
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Cooling
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Slow cooling to avoid thermal shock
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Angled Facet
Angling one or more of the lens surface can effectively reduce back reflection from the lens
surface(s). The option is available for all lenses with 1.8 or 2.0 mm diameter and a length of at least 2.3mm.
There are two types of angled facets available. With the Single-Angle Option, one lens facet
is tilted while the other remains perpendicular to the optical axis. With the Double-Angle Option, both facets
are tilted identically such that they remain parallel to each other. Minimum order quantity is 50 pieces. Back
reflection can be further minimized with the use of AR coating.
Table 4 Specifications
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ITEM
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Single Angle Specifications
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Double Angle Specifications
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Angle (q) Options
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2°, 4°, 6°, 8°
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1°,2°,3°, 4°
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Angle (q) Tolerance
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q +/- 0.5°
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Lens Length on Axis (Z)
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Calculated Length +0/-0.04 mm
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Top Width (A)
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0.5 +0.05/-0.20 mm
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Perpendicularity
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6 mrad max. for non-angled end
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| Ordering Information |
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Example:
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Example
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AR Coating
Grade
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# of
Surfaces Coated
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Metallization
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Angled Facet
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SLW
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180
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025
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130
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A
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1
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M
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2D
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- AR Coating Grade: A, C, D, W (NC = Non-coated)
Metallization: M = Metallization, 0 = Non-metallized
Number of Surfaces Coated: 1 = one side coated; 2 = both sides coated
Single-Angled Facet: 2D=2°, 4D=4°, 6D=6°, 8D=8°
Double-Angled Facet: 1DP=1°, 2DP=2°, etc.
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