Keep Your Optics Clear,
Gap Filler 1500LV Offers Over
10x Reduction In Outgassing.
Henkel’s Gap Filler 1500LV supports greater clarity inside
sensitive electronic applications where fogging of lenses or
optics from outgassing is a consideration.
Control outgassing, improve thermal performance for a clearer environment.
Gap Filler 1500LV is a low volatility, two-component,
liquid-dispensable thermal interface material. This
ultra conformable elastomer provides a thermal
conductivity of 1. 8 W/m-K. It oFers the high
temperature resistance and low modulus of a
silicone material, with significantly lower levels of
outgassing. At higher temperatures, volatiles from
outgassing can create issues in enclosed fixtures
such as lighting where the clarity is crucial.
Gap Filler 1500LV is ideal for use in these lighting
applications or other situations where fogging of
lenses or optics is a potential consideration.
Low assembly stress on electronic components.
Gap Filler 1500LV is thixotropic and although it will remain in place after
dispensing, the material will flow easily under minimal pressure resulting in little to
no stress on fragile components during assembly. Gap Filler 1500LV cures at room
temperature – and the curing process can be accelerated with the addition of heat.
When cured, this material provides a soft, thermally conductive, form-in-place
elastomer that is ideal for filling unique and intricate air voids and gaps.
Another innovative thermal solution for optimized dispensing.
Henkel’s brand of Bergquist products consists of many industry leading thermal
materials used to dissipate heat and keep electronic components cool. Gap Filler
1500LV is just one of an expanding line of liquid dispensed materials. Unlike
precured gap filling materials, liquid dispensed materials oFer infinite thickness
options and eliminate the need for specific pad thicknesses or die-cut shapes for
individual applications. Applying precise amounts of material directly to the target
surface results in an eFective use of material with minimal waste.
To qualify for your FREE Gap Filler 1500LV Kit, call or visit our website:
Headlight assembly with a
standard thermal interface material
*Simulated, typical lense fogging results may vary
Headlight assembly with
Henkel Gap Filler 1500LV
regulations | SAFE T Y
lest the luminous intensity of the single emitter be too low for measurement with a (luminaire) goniophotometer. The area described
by an 11-mrad FOV at d1 of diameter 0.011∙d1 should then be considered. If only one emitter falls within this area as is the case in
the lower image in Fig. 4, then d1=dthr. Where more than one emitter falls within this area, and where Ethr was taken from the LED
emitter datasheet, as opposed to resulting from the measurement
of the luminaire, it does not necessarily follow that RG1 be exceeded
at this distance. It is in this case recommended to perform a spectral radiance measurement at d1 in an 11-mrad FOV, if the result is
below the RG1 limit, d1=dthr. In all other cases the true value of dthr
lies between these extremes, so the default position is to adopt the
worst case, dN=dthr.
Should one wish to continue the analysis, one could consider the distance, d2, at which is found the Ethr of, for example, an LED module or
light engine used in a luminaire. One would simply repeat the same process described here.
To measure d1 (or d2) requires that all other emitters in the luminaire be extinguished or covered, which in many instances is neither easily realizable nor practical. One could compute the required
increase in the area over which the 11-mrad FOV must average to
reduce the blue light radiance (LB), to the RG1 limit. Estimating the
area (A) of a single emitter, the diameter of the FOV required to reach
the RG1 limit, d=√LB×A/π×10000. If only one LED falls within the circle of diameter d, dthr=d/0.011. If more than one emitter falls within
the area, the number of emitters should be included in the computation and an iterative method applied. Although this technique may
present different challenges to that of Annex D, it can be useful for
the analysis of some sources, and in other cases as a screening mechanism to determine where effort should lie.
The implementation of IEC TR 62778 and the new approach to the evaluation of the photobiological safety of sources intended for lighting applications will in many instances lead to a simpler assessment. In others,
where a refinement of dthr is sought, additional interpretation will be
required, yet interpretation in standardization can be problematic. This
highlights the need for a sounder metrological approach to the determination of dthr. It is expected that now, with the harmonization of the
revised editions of the majority of lamp and luminaire standards to the
EU low-voltage directive, IEC TR 62778 will be increasingly consulted
and applied. It is also anticipated that the issue of extended sources has
not yet been laid to rest.
TABLE 3. Overview of IEC TR 62778
Method A Method B Method C
Input(s) CCT CCT Luminance
Result(s) Ethr RG1 (unlimited) Ethr RG0 (unlimited) RG1 (unlimited) Ethr