Single-Line Laser Scan Engine Integration Guide
Table Of Contents
- IS4813, IS4815, IS4823 and IS4825
- Copyright/Trademarks
- Table Of Contents
- Introduction
- Assembly
- Mounting Specifications
- IS4813 and IS4815 Scan Engine Dimensions
- IS4823 and IS4825 Bracketed (-1 and -2) Dimensions
- IS4823 and IS4825 (-0) Decode Printed Circuit Board Dimensions
- Exit Beam Specifications
- Enclosure Specifications
- Electrostatic Discharge (ESD) Cautions
- Grounding
- Power Supply
- Power Sequencing
- Flex Cables
- Thermal Considerations
- Printed Circuit Board (PCB) Component Clearance
- Magnetic Sensitivity
- Airborne Contaminants and Foreign Materials
- Beam Clearance
- Output Window Properties
- Output Window Coatings
- Output Window Angle
- Minimum Allowable Window Position RequiredTo Avoid Detrimental Internal Reflective Beam Interference at Positive Exit Beam Angle Tolerance
- Minimum Allowable Window Position Required To Avoid Detrimental Internal Reflective Beam Interference at Negative Exit Beam Angle Tolerance
- Scan Engine Field Of View And Depth Of Field
- Descriptions Of IS4823 AND IS4825 Operating Modes
- Serial Configuration Mode
- General Design Specifications
- Detailed Electrical Specifications
- Scan Engine Terminations
- Decode Printed Circuit Board Terminations
- Flex Cable Specifications And Installation Guidelines
- Timing Diagrams
- Bar Code Element Time Calculation
- Regulatory Compliance
- Limited Warranty
- Patents
- Index
- Contact Information
- MANUAL DATE CODE
12
Beam Clearance
• Keep the scan engine’s beam sweep free from obstructions. For detailed information on the exit beam
angle and location, please refer to Exit Beam Specifications on page 9.
• A dark matte-finish on the internal walls of the housing can be utilized to avoid internal beam
reflections.
Output Window Properties
Note: Contact a customer service representative to coordinate the best window material required to maintain
laser safety requirements for your application.
An improperly placed window has the serious potential to reduce the scan engine’s performance.
Careful consideration must be made when designing the output window’s distance and angle
placement relative to the scan engine’s exit beam and chassis.
Follow these guidelines when designing the output window.
• Acceptable window materials include; Acrylic (cast or molded), float glass, CR-39, and Polycarbonate.
Note: Molded polycarbonate is high in strength; however, it might exhibit a phenomenon called
birefringence. Birefringence refers to multiple indices of refraction within one material.
This condition will induce polarization effects that can be detrimental to scan performance of the
engine. Check with a representative before utilizing a transparent polycarbonate material for
the output window.
• The exit window material should have a spectral transmission of at least 85% from 640 nm to 690 nm
and should block shorter wavelengths.
• Red cell-cast acrylic is recommended.
• The exit window should exhibit a wavefront distortion (transmission) of no more than 0.2 wavelengths
peak-to-valley maximum over any 0.08" diameter within the clear aperture.
• The clear aperture of the output window should extend beyond the 54° beam sweep (see Exit Beam
Specifications on page 9).
• It should have a 60-40 surface quality and be optically flat, clear, and free of scratches, pits, or seeds.
If possible, recess the window into the housing for protection or apply a scratch resistance coating (see
Output Window Coatings on page 13).
• Apply an anti-reflective coating to the window surfaces to reduce the possibility of reflective light
interfering with the engine’s performance due to the window angle (see Output Window Coatings
on page 13).