Linear Polariser for Ring Light R80


(A) Polariser

Smart Vision Lights have linear Polarisers available. Polarising filters can reduce reflections on specular surfaces. A polariser can be added in the field. Filter for light series – L300, ODL300, S75, ODS75, S30, R80 & R130.

• Transmittance: single: 38%
• Color: neutral gray
• Polarising efficiency: 99.98%
• Wavelength: 400~700nm
• Thickness: .030" (.762mm)
• Direction: Linear

Linear Polariser Lifetime

Use of Linear Polariser and High Power LEDs
High Power LED’s are increasing in output thru continued product development by LED manufacturers. High Power LED’s in white are now available in 100+ lumens in output intensity. Smart Vision Lights continues product improvement by using the highest power LED’s available. The new High Power LED’s can damage a linear polariser. A Linear Polariser has a typical transmission of 38% while blocking 62% of the light not in the polarisation plane. The 62% of light blocked is energy that is turned into heat. This heat must be dissipated or a breakdown of the material will occur over time. Linear Polarisers currently available cannot dissipate the heat when the latest 100+ lumen high power LED’s are used in lights.

Strobing Linear Polarisers on Lights
The Linear Polariser material will fail when the LED light is used in a constant operation. Smart Vision Lights mandates a limited exposure time for linear polarisers. Using the Light in strobe application will limit the exposure time and heat energy needed to be dissipated by the linear polariser. A 10% duty cycle or less is recommended when a linear polariser is used on a light.

Duty Cycle (D) is defined as the ratio between Strobe Time and Rest Time
Recommend Duty Cycle for Linear Polariser is 10%
Calculating Rest Time - RT

RT = ST / D
    where -    ST is the Strobe Time
                    RT is the Rest Time
                    D is Duty Cycle

 

(B) Installation

Add on Diffuser or Polariser
New mounting for diffusers and polariser’s on L300 & ODL300 series Linear lights and S75 & ODS75 Brick lights. The New inserts add a permanent mounting for diffusers or polariser’s on lights. The new mounting allows diffusers and polariser’s to be installed in the field.

Inserts - “push in”
Smart Vision Lights recommends installing the brass inserts with a blunt object. The inserts are best installed in the bottom of the slot see figure 1. The insert can be installed by pushing the inserts into the slot from the side see figure 2. Heating the insert with a heat gun will help with less force and an easier install. If heating is used, heat the insert. DO NOT heat plastic housing on the light.

Insert at bottom of slot ready to be pushed in	Pushing insert into Housing

Installing the diffuser or polariser
Use 6 inserts/screws for a Linear light and 3 inserts/screws for a Brick light. Snug down screws to diffuser or polariser. Over tightening screws can break diffuser/polariser or inserts will begin to pull toward surface. Do not over tighten with excessive force. For added stability on a permanent installation, a thread locking compound may be used on the screw.

Correctly installed insert	Correctly installed insert insert & screw