Recent content by MG_xy

Thank you for your fast reply. In the attachment you can find a raw scheme of my experimental setup. I thinck that a pair of achromatic doublet lens could be a good choice. But I need some suggestions to make a proper choice of focal lenses in order to obtain a beam focused on the the base of...

Dear all, I am going to realize an experimental optical setup and I need your suggestions to make the correct selection of lenses. A polychromatic light beam coming from a monochromator (400-700, slit dimension: 1 mm, cone angle 11°) has to be focused onto the base of a cylindrical lens. I...

Dear all I need collimating light from a Xe arc source. More in details, the white light source is coupled to a monochromator. In fact I need a circular collimate light beam from the monochromator with a diameter of 1-2 mm. At the moment I am using a (rectangular) slit in the monochromator...

Thank you K^2, I am using a monochromator to select specific wavelengths and I know the spectrum of the source. My doubt is how to calibrate across the spectrumby taking into account the responivity of the photodiode practically.

Dear all, I am new in this forum; from a first sight I realized that you can help me to clarify a doubt. My experiment requires the measurement of spectral trasmittance of a simple by using a white light source (400-800 nm) and a silicon photodiode. I know that a proper measurement require to...

Dear all, I need realizing an electromagnet producing a magnetic field changing in direction with a given frequency (from 100 to 800kHz). Max intensity should be 400-500 Oe. I need applying this magnetic field in a small region (10x 10 mm2) and I would prefer the electromagnet not so big...

Thank you very much! Your suggestions will be very useful to me!

Thank you for your precise reply, My sample is a squared slim slab with dimensions of 2 x 2 cm2; I need to apply an uniform magnetic field (between 50-500 Oersted) in the direction parallel to the plane of the slab. A “C” magnet could be a proper solution, and the two arms of the “C” could be...

Thank you for your hint but probably this is not what I am looking for. The “object” that I have to characterize is small, in the order of cm, so probably a proper coil or an electromagnet can be useful, in order to control the magnetic field by the current. The problem is that this coil...

Dear all, I need a suggestion for my work. I have to measure the variation of some optical features of a material in presence and absence of a magnetic field. Hence, I need to “switch on” the magnetic field in a given instant time, to record the signal an then ““switch off”, or even to change...