Nikon Alphaphot Phase Contrast Annulus Slider

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J_WISC
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Location: Wisconsin, USA

Nikon Alphaphot Phase Contrast Annulus Slider

#1 Post by J_WISC » Wed Jan 25, 2023 4:06 am

Hello.

Can someone help me correctly install/use a Nikon Alphaphot Phase Contrast Annulus slider? Something appears wrong. I just acquired the microscope and do not want to break the slider.

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The slider does not go in far enough to sit under the condenser, nor out far enough to clear the condenser for normal operation:

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There is a tiny screw (upper left) limiting movement; the screw also blocks removal of slider:

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Right now, I'm just getting an interesting example of the use of oblique illumination, not bright field or phase contrast. Thank you for help, suggestions, or sources of information. I tried hours of Googling and learned there's a manual for the slider, but I cannot find the manual or a guide.

lorez2
Posts: 113
Joined: Wed Apr 21, 2021 2:06 am

Re: Nikon Alphaphot Phase Contrast Annulus Slider

#2 Post by lorez2 » Wed Jan 25, 2023 4:31 am

You might try screwing the small screw farther down into the slider. It's possible that it is a stop pin that works properly on the other side.

lorez
Nikon 80i

J_WISC
Posts: 107
Joined: Sun Mar 06, 2022 7:28 pm
Location: Wisconsin, USA

Re: Nikon Alphaphot Phase Contrast Annulus Slider

#3 Post by J_WISC » Thu Jan 26, 2023 5:42 am

lorez2 wrote:
Wed Jan 25, 2023 4:31 am
You might try screwing the small screw farther down into the slider. It's possible that it is a stop pin that works properly on the other side.

Doh!!! Thank you. I tighten the screw. When tightened, the head is just high enough to prevent removal of the slider. It doesn’t lock it into place; it just prevents removal. When higher, or loose, it further restricted movement.

I was tempted to delete the question — sort of embarrassed — but I’ll leave it to encourage others to ask questions. Also, similar screws prevented removal of the eye pieces or proper focusing of the left eye piece! I did acquire it from a university surplus auction. I’m thinking the screws were there to ensure parts weren’t accidentally lost.

Thanks for all help. Especially ridiculous questions.

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