Flicker400 Light Source Modulation Characterisation

  • Flicker400 Source Modulation Characterisation
  • Example Light Source Flicker

Comprising a close-match photometric detector, high-speed amplifier and data acquisition, the Flicker400 provides high-accuracy flicker percent, frequency and index assessment in a straightforward, highly repeatable procedure.

Whilst the photobiological impact of flicker is still widely debated, the implications for image recording equipment are undeniably apparent and of increasing significance with the continued adoption of SSL in studio and stadium environments.

Core benefits

Features

  • Windows control software (BenWin+) provides full automation via USB 2.0
  • Setup comprises a DH400-VL v-lambda detector, ORM400 photometric detector, the 477 and the USB Digital Scope.

Applications

  • ENERGY STAR® Method of Measurement for Light Source Flicker
  • California Energy Commission Appendix JA10
  • 1789-2015 - IEEE Recommended Practices for Modulating Current in High-Brightness LEDs for Mitigating Health Risks to Viewers
  • UEFA Stadium Lighting Guide 2016
  • CIBSE LG04 Lighting Guide 04: Sports Lighting - LG4
  • ASSIST recommends…Recommended Metric for Assessing the Direct Perception of Light Source Flicker, Volume 11, Issue 3 (ASSIST 2015)

Reported Parameters

  • Percent flicker
  • Flicker index
  • Flicker frequency

Photometric Detector/ ORM400

Spectral function

CIE 1924 V(λ) Spectral Luminous Efficiency Function for Photopic Vision

Spectral response range

380-780nm

Photopic match, f1

<3%

Angular response, f2

<1.5%

Linearity, f3

< .2%

Typical responsivity

5x 10-10A/lux

Calibration traceability

Physikalisch-Technische Bundesanstalt (PTB, Germany)

Diffuser diameter

7mm

Stray light suppression

Variable aperture baffle tube

Connector

BNC

Amplifier gain ranges

1010-105 V/A

Maximum input

100µA

Input impedance

Virtual ground

Gain accuracy & stability

±1 %, 200 ppm/ °C

Output stability

5-500 ppm/ °C dependent on gain range

ADC resolution

4 ½ digit BCD (0 to 19999) (>14 bit resolution)

Luminous intensity range

0.01D2-200000D2 (D photometric distance (m))

477 - AC Current Pre-amplifier frequency response

V/A

Bandwidth (-3Db)

103

>1MHz

104

1MHz

105

260kHz

106

30kHz

107

23kHz

108

4kHz

General

Power supply

PMC MAC ORM400

Interface

USB 2.0

System Requirements

Component

Current (220V) (A)

ORM400

<0.1

Total

<0.1

Software Control

BenWin+ software package captures data acquisition and export, alongside performing flicker percent and flicker index calculations.

A comprehensive SDK is made available where enhanced functionality or incorporation of third party instruments are required.

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