PD300-MS | Laser Photodiode Sensors | Power Sensors - Ophir

PD300-MS

7Z02482
 

The PD300-MS is a Microscope Slide power sensor that measures the optical power at the sample plane in a microscopy setup. The silicon photodiode measures from 350nm to 1100nm at optical powers ranging from 3µW to 1W and is designed to be a microscopy power sensor that answers the needs of fluorescence excitation measurements. The sensor has a footprint of 76.0 mm x 25.2 mm matching that

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  • 18x18mm
  • 350-1100nm
  • 3µW-1W
  • 76 L x 25 W x 2.5 D (mm)
  • N.A
  • 20W/cm²
  • 0.2 s
  • 1W
  • CE, China RoHS
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Do I need to recalibrate my instrument? How often must it be recalibrated?

Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.

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How can I measure light coming out of an oil immersion objective?

This is easy with the PD300-MS all you need to do is place a drop of oil on the center of the sensor surface and immerse the objective lens in it. After measurement just wipe down the sensor and clean it for another use.

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The area of the sensor is large, can I measure light at any point on it?

The sensor is large in order to 'catch' light coming out of the objective at large angles, it is most accurate when the light is centered on the surface – you should use the target on the backside of the sensor to position the sensor optimally.

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PD300-MS Microscope Slide Power Meter PD300-MS Microscope Slide Power Meter
Photodiode Sensors for Measuring Very Low Powers Photodiode Sensors for Measuring Very Low Powers Photodiode Sensors for Measuring Very Low Powers

In this short "Basics" video, we review in general the use of photodiode sensors for measuring very low laser powers.

Experiments using fluorescence microscopy? Ophir’s new PD300-MS Microscope Slide Power Meter lets you accurately measure the exact amount of light applied to a specimen, so experimental results across different equipment can be…objectively compared. The PD300-MS has the footprint of a standard microscope slide, and goes right in the object plane of your microscope.

Tutorials and Articles

Laser Power Sensors introduction

As described in the general introduction, the thermopile sensor has a series of bimetallic junctions. A temperature difference between any two junctions causes a voltage to be formed between the two junctions. Since the junctions are in series and the «hot» junctions are always on the inner, hotter side, and the «cold» junctions are on the outer, cooler side, radial heat flow on the disc causes a voltage proportional to the power input. Laser power impinges on the center of the thermopile sensor disk (on the reverse side of the thermopile), flows radially and is cooled on the periphery. The array of thermocouples measures the temperature gradient, which is proportional to the incident or absorbed power. In principle, the reading is not dependent on the ambient temperature since only the temperature difference affects the voltage generated and the voltage difference depends only on the heat flow, not on the ambient temperature.

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Common Reasons for Photodiode Sensor Damage or Out of Tolerance Conditions

We have included this document with your recent calibration order because we have noticed an out of tolerance condition obtained from your equipment when returned for calibration. This document was created to assist our valued customers in the proper care and maintenance of Ophir photodiode sensors. The following information is for reference only. If you have any reason to believe that the sensor is no longer performing within the original specifications, we always recommend that you send it in for repair and/or recalibration by our trained technicians to bring the unit back to the proper NIST traceable standards.

Ophir photodiode sensors can be used for many years without any repairs when used with the proper laser optical setup. Many of our customers have sensors that are using their original absorber that are over ten years of age. We hope that this document will enable you to also enjoy the long life and reliable results that Ophir- Spiricon is known for.

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Effect of Ambient Conditions on Laser Measurements

We are often asked about the specified ranges of various ambient conditions (temperature, humidity, etc.) for Ophir instruments. In this article we will clarify the effects of these conditions on laser measurements, so you’ll be able to use your Ophir laser measurement instrument effectively.

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