| |
| |
Tips on Edging Super Hydrophobic Lenses
- Use edging blocks that allow for conformability to the various lens curvatures being processed. Rigid and older style metal edging blocks do not offer enough contact area between the blocking pad and front surface of the lens.
- Match the edging clamp shape to the proper block shape to prevent undue stress and bending during the edging cycle.
- Only pad up enough blocks for the AR jobs in the queue awaiting the edging cycle.
- Pre-padding too many blocks the night before or in the morning for the days production will raise the chances of pad/block separation due to various ambient conditions.
- After blocking the lens, allow a dwell time between of 15 to 30 minutes prior to placing in the edging chamber. This is the optimum window of preparation time. Proper dwell (hold time) will allow the adhesive structure to properly cure to the slick front coatings which will help prevent any slippage during edging.
- Use an edging mask on the concave surface to protect the lens from clamping marks and to prevent any contaminants from damaging the surface.
- Verify and maintain that the edging wheels and / or blades are clean and sharp. Any dullness or excessive wear will create a dragging or tearing phenomenon resulting in lenses that will twist or slip off axis.
- Follow the manufacturer’s settings for your edger’s to achieve the optimum clamping pressure and lens rotation and feed rate.
- Edge to the exact size. Slightly oversize lenses will lead to bending or stressing of the lens during glazing which can cause fractures in the coatings and distort the optics.
Our OLA Award of Excellence Winner, HydroEdgeTM edging pads for super hydrophobic lenses, has been developed with proprietary adhesive and innovative technologies offering the most reliable and reproducible edging results. HydroEdgeTM has been preferred in the market for labs of all sizes and varying technology platforms regardless of the particular AR brand.
HydroEdge™ Directions for use:
1. Remove pad from white liner and apply to clean and dry finishing block. Match the base curve of the lens to the correct base block or utilize one of the popular flexible blocks such as Stellar or Kappa / Gamma to assure good conformability to the lens curvature.
2. Remove protective HydroEdge™ liner to expose blue tab. Avoid touching the adhesive — apply this side to lens surface.
3. Allow blocked lens to dwell (rest) for 15 minutes to ensure proper adhesive curing to the lens surface prior to placing in the edger.
4. Edge lens utilizing the proper settings and feed rates as recommended by the edger manufacturer for AR coated lenses.
4. De-block lens and remove HydroEdge™ pad.
|
|