I would mention that the F-35 has all of these systems too but yes.
It does supposedly incorporate lessons from Storm Shadow so it will have some degree of RCS reduction particularly as only 2 of the 4 aircraft that use it have semi-recessed pylons (EF and KF-21).
It is useful for targeting, slight double edged sword as it uses a Laser rangefinder for ranging and both the F-35 and Rafale have LWS, but then again does it matter if both of them know each-other is there anyway, for guiding something like a MICA IR it should be fine regardless.
I think (but i can’t say for sure, so take it with a pinch of salt) the OSF can also guide MICA EM and Meteors. Although probably with a non optimal range compared to your usual non stealth target tracked by the radar
It can guide both using datalink, although the Rafale has 1-way datalink which is worse than 2-way datalink and I read it (1-way) cannot provide effective if any guidance during the terminal phase (when the missile may otherwise be pitbull which is when the Rafale would need it the most in our hypothetical), but I’m not sure how true it is about the 1-way datalink not being able to provide terminal guidance, so do take it with a pinch of salt.
from my understanding, the data given by OSF, radar and other sensors are fusionned. So long as a sensor gives you a bearing and range, you can theorically give this data to any missile through datalink, be it IR or Radar guided.
The way i understand it, the EMTI mentionned in the paragraph is a program that takes as input any data coming from a sensor (MICA IR seeker, OSF, RBE2 AESA, SPECTRA, Link 16…) and basically compiles this data. The compiled data is then returned to the pilot via display or sent through datalink to a missile for example.
Now obviously, assuming the data sent by the OSF to the EMTI is enough to guide a MICA EM or a METEOR, it will still be degraded, since the OSF probably has a worst range relative to the RBE2 AESA against a non stealth target
Just to get back on this, and even if i’m fairly certain this video is not a source in itself :
In this sequence (starting at 8’33"), ATE, who used to be pilot on Rafale M and SUE, mentions the RBE2 AESA, the meteor missile, and stealth planes. One sentence is “if you [the “baddies” in this context] switch your afterburner on, you’ll be seen ([through OSF, he mentions it before] and we [the “goodies”] will be able to shoot a meteor”.
NOTE : subtitles are available for non french speakers
This means that shooting a meteor through OSF only is most likely possible, although probably not as efficient as using the radar since i’d guess OSF has less range than radar itself
a few sources i got along the way, not exactly what i was looking for unfortunately :
OSF : it is, as vizender said comprised of an IRST and a TV camera coupled with a laser, as can be seen below :
Spoiler
This allows for detection up to 100 km and tracking, ranging and identification at 40+ km (source 1). Meteo conditions for this data were not given. Seing as OSF can give a bearing and a range (through laser telemetry) i’m pretty sure it can be used to guide anything, but not 100% certain still
Thales brochure (source 2 & 3) specifies OSF can be used for detection, identification, tracking and engagement in air-to-air mode. Unfortunately, they do not specify what missile exactly.
Finally, one interesting thing i encountered while searching for this was, apparently, you can fire a missile passively using SPECTRA (RWR), It is mentionned in the article (source 4). I would still take it with a pinch of salt, considering the article is pretty old and no other source mentions this.
At the end of the day, be it through OSF or spectra, it is still a “degraded” engagement mode, since you can’t really use the full range of a meteor for example.